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  • Osprey Packs - Aether 70 Backpack- 4000-4600cu in - Bonsai Green
  • Osprey Packs - Aether 70 Backpack- 4000-4600cu in - Arroyo Red
  • Osprey Packs - Aether 70 Backpack- 4000-4600cu in - Midnight Blue

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  • Osprey Packs - Aether 70 Backpack- 4000-4600cu in - Bonsai Green
  • Osprey Packs - Aether 70 Backpack- 4000-4600cu in - Arroyo Red
  • Osprey Packs - Aether 70 Backpack- 4000-4600cu in - Midnight Blue

Osprey Packs Aether 70 Backpack- 4000-4600cu in

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    5533

    33 Reviews

    Details

    The customizable pack that does it all.

    The Osprey Aether 70 Backpack is the pack that does everything from gear-intensive weekend backpacking trips to ski tours and remote summit bids. Built with outstanding load-carrying comfort, the Aether 70 features the IsoForm CM hip belt that adds stiffness and padding for better performance with heavy loads without increasing the Aether's weight.

    For support, the Aether is built with a LightWire frame and is equipped with a single aluminum stay to distribute weight to the cushioned IsoForm waist belt where the load of the pack can be more comfortably carried. In addition to a large top-loading design that swallows gear whole, Osprey equipped the pack with a large front panel zipper that can be used to access deeply buried layers, without having to dump your pack out on the trail. The top lid can be removed and is fitted with an adjustable waist belt, enabling the lid to double as a lightweight lumbar pack ideal for summit bids and quick day hikes from a remote base camp. Multiple straps along the front of the pack secure everything from ice axes for alpine missions to trekking poles during week-long treks.

    • Designed for gear-intensive weekend trips and week-long treks
    • Supportive LightWire frame and single aluminum stay
    • Airscape back panel is breathable and cushioning
    • Top-loading design with J-zip front panel access
    • Removable top lid doubles as lumbar pack
    • Hydration system compatible (reservoir not included)
    • Multiple straps for trekking poles and ice axes
    • Sleeping bag compartment keeps gear secure and organized
    • Item #OSP0321

    Tech Specs

    Material
    210D nylon, 75D nylon stretch ripstop, 500D nylon
    Volume
    [S] 4089 cu in, [M] 4272 cu in, [L] 4455 cu in, [XL] 4638 cu in
    Support/Suspension
    LightWire frame, Airscape back panel, 6061-T6 center stay
    Shoulder Straps
    IsoForm
    Hydration Compatible
    yes, external sleeve
    Reservoir Included
    no
    Pockets
    1 stretch mesh front, 2 zippered hip-belt, 2 stretch mesh side
    Sleeping Bag Compartment
    yes
    Detachable Daypack
    yes, lid
    Dimensions
    32 x 14 x 12 in
    Claimed Weight
    [S] 4 lb 8 oz, [M] 4 lb 12 oz, [L] 4 lb 15 oz, [XL] 5 lb 3 oz
    Recommended Use
    backpacking
    Manufacturer Warranty
    lifetime

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Home away from home.

    • Familiarity: I've put it through the wringer

    I lived almost entirely out of this bag for 7 weeks on the road. Not a single complaint. Fits comfy for backpacking. Holds enough stuff. Durable, has all the bells and whistles, straps and pockets you might ever need. Recommended!
    btw the midnight blue is a lot lighter in color in real life than in the picture.

    Comfortable Bag

    • Familiarity: I've used it several times

    I got the 70L Medium bag (I'm 6'2" 190# fairly athletic build). Bag weighed approx 50# before started out on 35 mile hike (Yes - I over pack & i'm ok with that). The shoulder straps are very well padded & stay in place. Didn't move & don't rub. I initially thought the hip pads would be short (based on previous pack) but they fit & rode great on my hips to carry the load of the pack. They're rigid enough & feel secure but never felt uncomfortable nor "felt" the load of the pack on my hips - which is where it should be. The back is adjustable, which is great. The initial set up was good, but I played with it before the hike & adjusted it to fit my build. The back frame is more rigid than my previous pack - it was well padded & allowed for a lot of ventilation. My back didn't get sweaty or sore. It kept the straps off my shoulders. There are a lot of great pockets & access points. The pole sleeves were nice & accessible for me - didn't need help getting them off my pack where the other guys did (strapped on back of pack vs side). The pack has a lot of hooks/straps; more than i needed. The pack has enough adjustment to compensate for the various load sizes/weights to keep close & tight. I love this pack- super supportive & very comfortable.
    Obviously got pretty dirty - cleaned up pretty easily with a soft brush & water.
    We did encounter rain. This pack doesn't have a rain cover (not an issue - more for buyers information)

    Great size function for over 3 days

    • Familiarity: I've put it through the wringer

    I have taken this pack out many times. Love the fit of the M. I am 6 ft tall. Would recommend the medium. Lasted me for many years as well.

    Great size function for over 3 days

    Versatile, stylish and rugged pack

      I've had this pack for two years and used it backpacking in both snow and sun. The pack says 70l but I've stretched it to hold equivalent to roughly 80l. To start, this pack looks phenomenal, I have it in the blue and osprey has done and excellent job with a stylish and sleek design without compromising performance. The fabric is tough but lightweight and has stood up to being thrown into rocks, jabbed with pulls whilst under the plane and scraped on the bottom of busses. The water bottle holders allow for vertical and horizontal storage and are spacious enough to accommodate my nalgenes as well as one or two miscellaneous items such as my sun glass case. The only complaint I have is that the brain only has one main pocket and this often becomes slightly disorganized. The pack has plenty of room on the inside and the numerous outside compression straps give plenty of additional places to tie and lash things on. Overall I have loved this pack and it has got my needs perfectly for 3-10 day expeditions.

      Perfect Pack

        Packed 55 lbs into this beast for a 5 mile, 4 day camping trip. Was very comfortable, even with that amount of weight. Was a perfect pack on the way out after most of the food was gone. would be an excellent back for covering some serious ground, as it packs down very nicely without feeling like it is too big of a bag. Would highly recommend.

        Osprey!

          Osprey thinks of everything which was why it was a no brainer to purchase this bag. Fits super well, very comfortable which is huge when you are packing heavy gear for a long ways. Also it has all the bells and whistles. A pocket or place for everything which is great to keep everything organized.

          You can live out of this!!

          • Familiarity: I've put it through the wringer

          This bag is awesome. The first time I used it was a month long trip hitting Zion, Bryce, Joshua Tree, and many other awesome places. It is big enough that you can store all of your camping gear and equipment. On one part of my trip we had to use bear canister and as the nice guy I am I volunteered to carry it. It was a pretty large container and fit perfectly in the bag along with my personal stuff. I did pawn my tent off on my buddy but other than that everything fit great in the bag.



          Osprey is a awesome company and I highly suggest buying one of their packs and the Aether is a great choice for any multi day trip!!

          You can live out of this!!

          Perfect all around pack

          • Familiarity: I've used it several times

          I bought this pack to ice climb mt rainier. I've put it through some abuse and osprey packs are the best, particularly this one. It has space for everything you need on multi day trips and you can break it down and compact it if you are only using it for a day hike. Highly recommend

          Perfect all around pack

          Of course Osprey

          • Familiarity: I've used it once or twice and have initial impressions

          Used only once so far, but I am sure you won't be disappointed. Feels confortable to your shoulders and back; Feel like fabric is fresh so great for long walks over the sun

          You can never go wrong w/ Osprey

          • Familiarity: I've put it through the wringer

          This is a great pack. Only used it a few weeks, but my most recent trip to the desert was made because of it. Just finished up backpacking in Big Bend National Park, it was awesome. The pack has plenty of room for everything you need and feels extremely durable. Highly recommended!

          Arguabley the best pack out there

          • Familiarity: I've used it several times

          Osprey makes some of the THE best packs on the market. The Aether 70 will not disappoint on any long hike to wherever you are going. The breath-able frame is clutch on the hot days of summer and allowing your back to cool a little bit when needed. The foam is super comfy and the brain comes off when needed. Lots of a great features the only bummer is that the rain-fly is not included but you can't have it all. Some people like to shed that if they don't feel they need it on a hike so it's not there. Overall very stoked on this pack and you will be too!

          Great long distance pack.

          • Familiarity: I've put it through the wringer

          One season under this packs belt and over 300 miles hiked. The true test was the 100 mile wilderness in Maine. The pack carried everything I need and some luxuries. I can carry 55 lb packs over long distances easy enough, so I brought everything I wanted. The first test was comfort with 55 lbs. Two day in and 50 miles completed, my hips were fine. No chafing of the skin and my knees were free of fatigue or soreness. So the weight distribution was good and the waist belt did great for comfort. The pack rode well even when I was running, I like to do that. After completing my summer hikes, I geared it up with my ice climbing gear and use it for mountaineering. It still looks like brand new, that's some tuff fabric they make it with. Hats off to Osprey!

          Love Osprey!

          I just got back from five days on Michigan's North Country Trail and being fall a little extra clothing is required. We went from nice sunny fall weather to cold, wet snow. The Aether handled the weight with remarkable comfort.

          Love Osprey!

          Great load hauler!

          • Familiarity: I've put it through the wringer

          I'll start this review by saying I absolutely love this pack. It is great for overnighters all the way up to week long trips. I have used it for simple overnight short trips and for extended fishing trips in the Cloud Peak Wilderness. It has the capacity to carry everything you need, even when I bring all my fly fishing gear (I tend to always bring way too much fishing gear). The pack stays stable on steep scrambles, long descents, and flat ground. Its got great hauling capacity, I can hardly feel a difference between 20 pounds and 45 pounds on my back.



          I was fitted as a size medium at an REI and the medium size aether fits perfect. The adjustable back and hipbelt really help to dial in the fit!

          Great load hauler!

          Easy to use, easy to store

            This bag is probably the best all-round backpackig backpack thats available. I bought this a couple of months ago after I spent a couple weeks in The Rockies using a 70 liter Kelty pack. The benefits from having a larger bag came with very few drawbacks so I imediately started to search for a bag around 70 Liters. Ive used this pack for several multi-day excursions in locations like the rockies, the AT and Northern Michigan and I've been very impressed. My favorite part about this bag is that it comes packed very small, and is very easy to store because the suspension belt is removable. Having the ability to keep this safe in my dorm locked in a small trunk with all my other gear is impressive. I just wish that Osprey provided a rain fly that came with this like they do with European purchases.

            Features Galore

            • Familiarity: I've used it several times

            If you are looking for a specific feature in a backapacking backpack, there is a good chance that the Aether has it! Particularly I like what they did with the hydration sleeve, putting it on the outside of the pack in the backpanel, giving you more room in the pack overall! The heat moldable hip belt is also incredibly nice, ensuring you get the perfect fit for those long journeys. Further, the sleeping bag compartment and the J-zipper allow easy access to anything in your bag. I have only had a chance to use this for climbing, but it fit my 70m rope, 15 draws, shoes and harness with plenty of room to spare! In my opinion, a serious must have for your next backpack!

            Hey Daniel, Leta here with Osprey. I completely agree! I have the women's Ariel 65 (women's version of the Aether 70), and i know it will always be my go to. Osprey has created a new series called the Atmos and Aura AG, and really, the Ariel still wins my vote, hands down.
            Thanks for the review,
            Leta

            Why would you pick the Atmos AG 65 over over the Aether 70? And, why would you pick the Aether 70 over the Atmos AG 65?

            Hey Ed - I have used both these packs and the biggest benefit of the Atmos AG 65 is the Anti-Gravity suspension system. It is by far the most comfortable pack I have ever used. The Aether 70 will have a little more volume and is slightly taller but I would recommend the Atmos AG 65 all the way. Feel free to contact me directly with any additional questions.

            - Kyle L. - Expert Gearhead

            Does the osprey aether 70 come with a rain cover?
            Thanks!

            Has anyone carried skis with this pack?

            Hey there, I have not, but have seen the pack loaded with skis on A-framed. The pack is not specifically designed to carry skis, although it can. does that make sense? So there are specific packs, like the Kode and the Variant that are designed to carry skis and do so really well. This pack, designed for backpacking can absolutely to it, just not as well as the packs that are specifically designed for the job. Hope that helps!



            Leta

            Osprey Rep

            ok so i am a new hiker but i have always loved the outdoors and camping and such so i am ready to invest in a new backpack. I was look at the osprey aether 60 and 70 and innicially i had my heart set on the 60. Now i am realizing that the sizes the 2 models offer do may not mean what i thought they did. When the options say S, M, L does that account for the size of the actual pack or the size according to the person whereing it? Also are both these packs acceptable for women to where them. THANK YOU!

            Best Answer

            Sophia,



            Great questions! So the S, M, L is for the torso length and effects the volume of the pack slightly.



            email me at jdowns@backcountry.com and I can work with you on whether a 60 or 70 liter pack is more appropriate for you.



            Shoot me an email anytime you have questions!



            Jared D.

            Expert Gearhead

            801.736.4336

            jdowns@backcountry.com

            Sophia, first of all, thanks for the question. If the pack is for you, please look at the women's version of this series, called the Ariel. Consider the Ariel 55 or 65. The torso length is what will fit you, or not! It is NOT your height! There is a sizing chart for Osprey on Backcountry, and you can measure it with those instructions. Please let me know if you have any other questions. Happy to help!



            Leta

            Osprey Rep

            in the description it says "choose between S, M, L, and XL sizes depending on trip length and the amount of gear you carry" so does that mean that the backpack size is not dependent on the wearers height/weight but instead the size is in regards to the amount of gear it can hold? i'm 6'0 180 with size 32 legs and am having trouble deciding between a L or XL without measuring my back or trying one on personally.. ??

            Best Answer

            If you look at the size chart (located directly above the spot where you choose the size) you will be able to determine the right size for your body type. If you are borderline L of XL the " trip length and the amount of gear you carry" might affect whether or not you choose the L or XL

            yes i see the size chart but i'm not able to measure myself or visit a store at the present moment so after reading the description it made me wonder if the sizing is more related to the amount of storage space or if the size is mainly related to fit.

            Hey,



            So I am actually just under 6'0'' tall and weigh in at 180 lb with a 32" inseam. I'd personally opt for the Large since your torso length is most likely right around 20"



            I'd start with a Large and if that doesn't work out, let me know and I can help out some more.



            Shoot me an email anytime you have questions!



            Jared D.

            Expert Gearhead

            801.736.4336

            jdowns@backcountry.com

            Hi,

            I am thinking about this back pack or Arial 65. I checked the size of the backpack but not sure which size would be more comfortable for me between S and M size. My height is 5'5, and weight is 147 pounds. My body type is slim but my chest is little bit thicker than ab since I used to work out. Please help me.

            Jun

            You should measure your back to determine your torso length. Have a friend use a tape measure from the bony part that protrudes out right under your neck (put your head toward your chest so it's more obvious) down your spine to the iliac crest (flat shelf bone at your hips above your butt). Then compare however many inches that is to the size chart. You're chest is not a factor because there is an adjustable sternum strap.

            Did you know you can fit a 5gallon bucket...

            Did you know you can fit a 5gallon bucket inside this thing? Awesome! and so glad I didn't have to clip it to the outside.

            I'm considering to get a backpack for all...

            I'm considering to get a backpack for all my camping and overseas trips (I live in Singapore), and I have plans to Central / South America for about 3-6 months and maybe some winter camping in Switzerland. Which do you think is a good option of a backpack - the Osprey Aether 70 or 85, the Tatonka Escape 60, or the Northface Terra 65? So far it's been 10 over years since I last backpacked, I'm totally a novice to backpacking gear :). BTW, I'm 5' 4", about 165lbs (yes, a considerably small sized for Asian :)). Thanks for the info!

            Best Answer

            If you are currently in the states heres what I would do. I would order this bag in both sizes the 70 and 60 to see if your stuff fits in there. The 60 is smaller of course but, if you can fit everything in a smaller bag its going to be a lot easier for you, especially travelling. I would stay with the Aether though, great pack and Osprey is an awesome back pack manufacturer.

            I really like the design of Osprey backpacks...

            I really like the design of Osprey backpacks and set on getting one, but trying to decide on a 70 or 85L pack. Thinking that I would need something that could handle a 7-10 day trip max although would probably re-fuel every 4+days. Maybe for Philmont and then also for any family backpacking trips.

            Best Answer

            I'm of two minds on this:



            1) If you're going to use it for family backpacking, then that extra volume can come in handy for light-but-bulky crowd pleasers (for my crowd, it's bagels). You can also choose to under pack it anytime you want. I go with slightly larger volume backs on scout campouts since i have to carry stuff that others will forget.



            2) The smaller the pack, the more judicious you'll be when packing... and 70 liters really should be big enough for what you're describing.



            3) if your plans include winter camping and/or you just have bulky gear, then I'd go with the larger size.



            4) if you have gear that can strap to the outside (z-rest, sleeping bag in a dry bag, etc. Or if you don't carry a tent... then I'd definitely say go with the smaller pack.



            There, that's four minds.

            What is the difference between the 2013...

            What is the difference between the 2013 and 2014 models? They are different prices but i cant see any noticeable tech difference

            Hi, I have two questions. 1) I have been...

            Hi, I have two questions. 1) I have been seriously looking at packs lately and am deciding between this in the 60 or 70 L, the Gregory Baltoro 65 pack, and the Osprey Atmos 65 pack for several 1-2 week journeys on the AT and would like to know people's thoughts on which pack would be best. (I'm posting this question here just because I'm not sure where else to post it and because the Aether is currently my top pick.) 2) When I looked at the store, I noticed that this pack has two open-ended buckles on the right side and was wondering what they are for?

            Thanks!!

            Best Answer

            David,



            That's awesome that you'll be getting after it on the AT.



            So recommendations for the proper volume size for a pack can be tough. It's a little tricky since I don't know exactly what you plan on carrying but if I were you, I'd be trying to get a 50-55 liter pack. Anything 60+ Liters is a bit large in my opinion. I own a 70 liter pack (first thing I bought when I knew nothing and the dude at the local EMS told me that was what I needed. He didn't know jack, just trying to pedal product).



            I hardly use my 70 liter. I'd look at 50-55 liter packs and really examine what gear you plan on taking with you and whether you really need it. Ask yourself questions about whether you need that first or second book, that third shirt or third pair of pants. Trim the gear and bring what you truly need. Plus by lightening your load, you'll have a far better experience.



            In regards to your questions though, I'd immediately rule out the Gregory Baltoro 75 because it weights a whopping 5 lbs 10 ozs (size small) up to 6 lbs 2ozs (size large) which is insane. I'd also rule out the Osprey Aether 70 because weights anywhere from 4 lbs 8 ozs up to 5 lbs 3 ozs.



            Out of these three options I'd lean towards the Osprey Atmos 65 due to the reduced weight.



            Jared D.

            Gearhead

            800.409.4502 ext 4055

            Jared's comments are right on the mark. I would agree that a 70 liter pack is a bit big (assuming this isn't winter camping) and you'll end up filling it up just because you can.



            However, if you have the discipline to NOT fill it up, I generally am happier with a slightly larger pack (like 65 liters) than Jared states. Part of this preference is that I like a tight pack with nothing hanging off of it (making noise, getting caught on stuff, etc) so I like to make sure I have the volume I need.



            Jared is again right on the mark when he says to look at the weight of the pack. You can get some pretty huge numbers if you're not paying attention.



            Not sure which loops/buckles you're talking about, but they might be Osprey's add-on system,?

            Thanks for responding to my questions guys! this actually helps a lot and was along the lines of what I was thinking. Jared, since you were saying a 50-55 L pack would be good, I am going to guess that the extra 5 in the Aether 60 wouldn't be bad. I do like the atmos, but I was a bit concerned at the fact that it seemed to have less of the easy acess compartments and some other features than the Aether does. When I tried on the Aether 60, I admit it seemed a bit heavier but not too bad because the weight seemed to distribute well and the girl at the store recommended it the most.



            To give some more details that I forgot, for the AT I am hoping to not be so much of a rookie backpacker and take everything under the sun. I was looking to at least be a little bit more minimalist and practice a few primitive skills that would lighten my pack, say by getting some of the food from nature instead of a bag.



            As for the buckles that I asked about, I originally thought they might be daypack attachments, but the two half buckles are only on one side of the pack so I don't think that would make much sense.



            Well, I think my options are at least narrowed down to two packs now. Thanks again for the input!!

            David Thiel,



            Solid points about 70 liter packs and winter hiking. Very valid as that is primarily the time that I use my 70 liter now. During the summer if it's a 2-3 day hike, I trim down to a 30 liter. I prefer to sacrifice some comfort to save a few ounces here and there. It adds up quickly! But you also have great points about a bigger pack that isn't crammed full. If it is filled but not crammed it can have great weight distribution with very little if any pressure points.





            David Roth,



            My apologies on skipping the buckles part of your question. I totally spaced on that!



            The Aether 60 is a good option for reducing some weight but still being able to carry a load.



            Just to get you thinking a little more, here's a few products I'd be looking at if I were you.



            ARC3649 (48 liters)

            BLD1276 (45 Liters)

            BLD1166 (50 Liters)

            GRG3290 (50 Liters)



            Those are all a tad small for you but still, to show you something maybe to aim for down the road. I have a feeling that half way through hiking the AT, you'll be ditching some gear if not sooner. It's all too common. Maybe look at some 55 liter packs? The common recommendation is to go for packs that are all too big and my thought process is if I have a pack a few liters smaller than I've got to really think through each piece of gear I'll be taking with me.



            Hopefully you're able to finish and when you do, get your self one of these little guys to celebrate:



            http://www.tarmadesigns.com/category/Appalachian-Trail



            Good luck!





            Jared D.

            Gearhead

            800.409.4502 ext 4055

            Those two open buckles are for the two compression straps on the front of the pack. If you are taking a lighter load you can run the straps all the way over to the one side to really snug down your load. The Aether series is add-on compatible, underneath the flaps of those two compression straps are 4 loops where you could attach a daylite daypack. If you are going to be doing base camping it is a good thing to have.

            Thanks for the responses guys. You pretty much cleared up everything else I was wondering about in regards to these backpacks. Jared, thanks for all of the additional info. I have heard from a bunch of people not to go larger because then you are tempted to fill the pack, plus an unfilled pack is an off-weighted one. Also, I am not doing the full trail right now, don't have the time. BUT, I am hopefully completing the NH section, which would be a nice chunk of experience under my belt.

            David,



            If your heading for the NH section of the AT you'll be in my backyard. You'll love it, but it'll be a bit of an ass kicker until your get your legs under you. There will be a ton of great spots but take some time to enjoy the Franconia Ridge and Prezi's.



            Enjoy!



            Jared D.

            Gearhead

            800.409.4502 ext 4055

            Coming from a guy who has done the John Muir Trail and the High Sierra Trail a couple times. It is very easy to overpack! However, if you are ever tempted to do i very long trek, i highly recommend going for a little bigger of a pack. I started out doing small weekend 3 day trips, and was hooked on it, and I have done the JMT three years in a row now. Very glad i got a bigger pack!

            Hey David, just throwing in my 2 cents. First off go with osprey! I'm a huge fan of their packs from day packs to climbing.

            So for long trips I prefer comfort over weight for the pack and lightweight gear. The Aether 70 will carry everything under the sun comfortably. It compresses fairly small but you still have the option that extra layer\meal.

            If you're just getting into backpacking and picking up all new ultra light gear a smaller pack will workout for you, but if you're like I was when I started out, using the bulky sleeping pad\bag, stove, puffy. Well a larger pack will help. After you're all geared up with lightest and smallest its quite easy to get away with a smaller size. Like Jared stated, its easy to pack light and right. Its just not cheap! Happy trails. Have fun!

            I have an older model of the Aether 70 ...

            I have an older model of the Aether 70 (2008 or 9).

            I can't remember what size i bought .

            The hip belt is marked as a medium. But i can't find the actual packs harness size anywhere ... .

            Where on the pack can i find a tag with the back length size?



            Thanks =P

            Generally Osprey puts a little tab around the frame with the size but I just checked My Aether and couldn't find one so you might just have to run into an REI or some other store and see if you can compare them. Unless you can actually find a tag that says the size it is going to be hard to guess without comparing it to another

            Has the Aether 70 been updated for 2013? Is...

            Has the Aether 70 been updated for 2013?

            Is it the 2012 models that are being heavily discounted?

            Thanks!

            Best Answer

            It looks like the same Aether 70 that it's been for years, with the exception of the what they're saying is a "new" isoform hip-belt (I would have to see and feel it to say definitely). I don't see what's being heavily discounted, so it's hard to say, but Aether 60s and 70s pretty regularly go on sale here and most places. Hope this helps.

            There are a few subtle tweaks to this model from the 2012. The hip belt has pockets, the side mesh was reshaped to make side reach storage possible (without taking off the pack to get at whats in there - I keep my knife sticking out of the hole). There is a small change to the configuration of the shoulder straps and the chest strap that make it MUCH more comfortable to wear for 8+ hours. Aside from being a bit on the heavy side, I love this pack!! Its heavy, but you can beat the crap out of it...