2015 Ski Guide2015 Ski Guide


Pack fast, pack light—without sacrificing water.

Yeah, a hydration pack is just a pack that has water and a straw, right? Osprey thinks differently—to Osprey, a hydration pack should be a full system that organizes your gear, clothing, and hydration. So grab the smallest of its Mantra series, the Mantra 20 Hydration Pack, and enjoy its full set of features in a lightweight, compact construction.

  • Built-in shoulder strap magnet holds your bite valve right where you can reach it
  • Mesh backpanel supported by LightWire incorporates air vents so you don’t get bogged down by the sweaties
  • Mesh-covered, perforated hipbelt provides stability without sacrificing comfort
  • Main compartment stows larger necessities—don’t get caught without spare layers
  • Zip stow compartment keeps smaller stuffs organized
  • Helmet attachment daisy chain gives you a spot to hang your climb, bike, or ski helmet while it’s not in use
  • Integrated rain cover comes out when the clouds let ‘er rip
  • Included 3-liter reservoir holds enough water for a major day out

Share your thoughts

Review Summary
10 4
1 3
1 2
0 1

What do you think of the

Osprey Packs Manta 20 Hydration Pack - 1000-1200cu in

? Share a...

Write a review

No file chosen

Rather attach a photo from another website?

Rather attach a photo from your computer?

  • Product review:
  • Share a video
  • Share a photo

How familiar are you with the product?(Optional)

Only jpg, jpeg, png, gif or bmp files please.


Here's what others have to say...

WInter Hiking

WInter Hiking

Posted on

This bag is great for everything from winter hiking to mountain biking dusty single track.

Want to ride to work without sweaty back....

Posted on

Want to ride to work without sweaty back. Can this fit my 13" macbook?

Responded on

Yes, but just barely. It will push out the fabric a bit and make it hard to fit much else inside the main pocket besides maybe a jacket. I have successfully transported my 13" macbook pro in it before though.

5 5

Awesome Pack!

This pack is the best daypack I've used. It's nice and light, fits tightly to your back and is well ventilated. I use this pack nearly everyday in the summer for trail running and it's perfect. Features that are especially well thought out are the magnetic hydration hose holder which keeps your water out of the way as you bound down the trail. And the dual hip belt pockets make it so you rarely have to take off and open the main pack compartment. The hip belt pockets are big enough for an energy bar, camera and a map.
The pack seems small and is best for those who know exactly what they'll need, as there's no space to overpack.
My only complaints might be the sometimes unecessarily big 3L water bladder (2L is my preference) which often causes the annoying water splashing effect. Also, despite being light, the pack has some over the top feature. For example, the hydro bladder compartment both zips and buckles closed and there is no need for load bearing straps over the shoulders on a pack this small.

3 5

osprey manta 20

initially and at one time i had an osprey raptor 14 AND a camelback mule nv. i came to the conclusion that there is NO perfect hydration pack as they all have one or two features one has that the other doesn't. ie: the mule nv had more room/pockets & the bladder was easy to clean with the detachable hose. i didn't like the ventilation system on the back of that pack. the small accesory pocket was useless. the raptor 14: i like the accesory pocket, it was larger than the mule's, i really like the helmet retaining clip but i loved the way the bite valve clips to the strap with a magnet. easy reach & great idea. so - i ended up returning both of those & got the manta 20. i decided to keep the osprey brand. i like the ripstop type material. i like the ventilation system in the back of the pack, and again, i really like the magnet bite valve. i also like the rain cover but i do miss the bike helmet clip. over all like i said, there is no perfect pack, but i'll take the osprey's features over the camelback - for now that is...

This is my first hydration pack (Osprey...

Posted on

This is my first hydration pack (Osprey Mantra 20) and, believe it or not, I can't get the water to come out of the bite valve. It dribbles out a little. I have taken the valve off, put it back on, opened the red valve and closed it again. I have turned it upside down to get the air out. I have obviously missed something. HELP!

Responded on

Did you turn the valve 90° - perpendicular to the hose? When the valve is in line with the hose, the water flow is turned off.

Responded on

Dave is right--the bite valve is open when it's at a 90° angle. If it is running super sluggish, contact Osprey and--at no cost to you--they'll either replace the bite valve or the whole reservoir if a new bite valve doesn't fix it.

5 5

Fully featured and vented!

I researched all sorts of packs primarily for Mtb and small day hikes. Naturally I was drawn towards the osprey line as I have several already and luv 'em. The talon series are sweet lightweight packs, but was drawn towards the raptor and manta series due to more features and the new hydraulics compression water system. I actually purchased the raptor 14 and luved how it fit, but returned it for this manta 20. The reason why? ...I really missed the hip pockets and wanted more ventilation. I took the manta on the second ride today on a warm Colorado afternoon and had very minimal sweat on my back. It felt very secure and comfortable, as well has nice side pockets for phone and snacks. The raptor is more "bike specific" with special pockets for pumps and lid lock helmet holder, but the manta gives me more of the features that I'm looking for. The quick access hiking pole holder is also a plus. (I use it on my talon 44 very often)

Buy this pack if you want A great multi use small frame pack with loads of features.

5 5

Great all around day pack.

I used this pack in Recreation Area. It carried out well with the load, my SLR camera,extra lense,binoculars & snacks.
Plus plenty of water,and I am loving it!

5 5

Amazing Pack

This pack is amazing. I got it for day hiking and mountain biking, mostly choosing the manta over others because of it's mesh suspension system. Boy am I glad I did. This thing packs features that I didn't even know I wanted.

Things to love:
Mesh suspension–keeps the pack off your back but secure–no sweat and everything stays in place.
Magnetic water hose holder.
A bladder that is easy to fill, has a built in twist off valve and doesn't taste like plastic–I never realized how much better then camelbacs you could get.
Built in rain cover–I haven't had to use it yet but I when I do need it I know I'll be glad to have it.
Enough space to stow everything you'll need for the day, but tight compressible enough that stuff stays in place when you only have the bladder, a power bar, and an extra tube and pump.
Thin profile–I'm tall and lean, it's nice to have a long thin pack that doesn't have hip belts that ride up to my belly button.

Things to not like:
The the hose mouthpiece always feels like it is at an awkward angle to me, kind of wants to twist out of my mouse if I'm not holding it with my hand... not sure why this is, but it is a very minor issue.
No side pockets

Best daypack I have every had. Buy one now and never look back.

Osprey Pack - Booth Lake Trail, Vail, CO

Osprey Pack - Booth Lake Trail, Vail, CO

Posted on

Responded on

Best and toughest trail in East Vail Colorado. Hydration is key!

Osprey Pack - Booth Lake Trail, Vail, CO

Osprey Pack - Booth Lake Trail, Vail, CO

Posted on

A great day pack with 3 L for hydration.

4 5

Great all around day pack

This feature loaded hydration backpack has seen me through several day hikes and long bike rides. It is light, comfortable, and large enough for any adventure you can dream up for a day, short of trad/sport climbing. Not sure its quite big/robust enough for a trad-rack and rope... ect.

Osprey did did a great job trimming ounces from this pack while preserving functionality and comfort. The shoulder straps are super light weight but reasonably well padded for comfort. The shoulder straps are also well ventilated (as is the back) to allow cooling evaporation in hot weather. I did notice that the straps left some abrasions on my shoulders after a 14 miler earlier this summer, but that is to be expected with any minimalist pack.

5 5

Really Nice

Bought this as my "long/high altitude ride" hydration pack, with additional duties for fourteeners and day hikes. Has exceeded my expectations on all fronts: super stable over technical terrain, best bladder in the business, and the magnetic bite valve holder is simple genius. I really don't think it's quite 20L, which is actually fine since it limits my tendency to carry more stuff than I need. In fact, I liked this pack so much that immediately upon my return from Colorado I purchased a Raptor 6 as my everyday riding pack.

5 5

Expensive but best in class!

I love this pack. I struggled at first when look at the osprey line because they range from 10 to 30 liters in size. I went with the manta 20 becuase I wanted a day pack that could work for short mountainbiking trips to all day rides. This pack is perfect for MTB. Stays super tight with hip belt straps, chest straps, and shoulder straps. The bladder has a rigid back so it doesn't slosh around when you are riding some bumpy singletrack. Perfect for an extra layer, food, your tools, extra tube, and your water. I also love this pack for day hiking. It has all the features of a full sized pack. Hip belt with pocket, trail pole strap, hydration bladder, included rain cover, etc. I bought one for my wife and she loves it. Certainly a little heavy but you won't find another 20 liter pack with all of these features. Get it!

im looking for a pack for overnight trips...

Posted on

im looking for a pack for overnight trips that i can fit my montbell 800 down that packs about the size of a nalgene, tarpten moment tent or a hamock , food for the night and a jet boil. Is this a good size or should i go bigger or a different style pack?

Responded on

1800cu in would be the minimum volume I would use for that gear plus 3 liters of water. The Osprey Manta 30 Hydration Pack is more realistic in my opinion and will give you that little bit of extra room you'll need to pull this off.

** Sorry I didn't see the Manta 30 was out of stock.

For this kind of outing, I would go with the Black Diamond Axiom 40 Backpack. It's lightweight (2.6lbs) and has a generous amount of volume for an overnighter. AND it's in stock.

Best Answer Responded on

I am gonna go with a no on this. I used the 20L for skiing all winter and it fits a couple of layers and snacks well, but not much else. The 30L would be PERFECT for the minimal amount of stuff you are bringing, but again, Backcountry is out of stock. However, they do tend to get stock pretty quickly. My one concern with the Axiom 40 would that it is pretty big for the amount of stuff you are bringing. Also, Osprey's 100% All Mighty Guarantee is the best warranty out there.

Responded on

Yea, no way you would be able to fit what you need for an overnight in this. I would even call it a little small for a day pack. Max you could fit is some food, first aid, extra layer/rain gear, and your water. I think 30-40 liter pack would do better for you.

I picked up a slightly used Manta 20 this...

Posted on

I picked up a slightly used Manta 20 this weekend which obviously didn't come with a bladder. Do I need to buy the Osprey proprietary bladder? Or, can I get away with just using one of my Camel Back bladders?

Best Answer Responded on

Hey Matt - Yes, you can use any other bladder, but the Osprey HydraLock system actually HOLDS the HydraForm reservoir in place. It gives gentle pressure for contant flow, reduces sloshing, and really, why would you want a formless IV reservoir in there anway? The HydraForm res doesn't allow barrelling on your back and allows for an easy load. WAY better!

Responded on

I use a camelbak and it works just fine. Great actually. SAVED me 30 bucks and doesn't leak. Not as nifty, sure, but then again, its about the outdoors - not marketing - for me.

I'm looking for a day pack for skiing that...

Posted on

I'm looking for a day pack for skiing that I can carry my skis on, and use for ice climbing as well. What would you recommend?

Best Answer Responded on

I would check out the Osprey Exposure 38. Its a great all around mountain pack that can cary skis, ice tools, and a fair amount of other gear. It also works great during the summer for longer day hikes and craging. Although its a fair amount bigger than this bag, it still feels great if you hardly fill it and use the compression straps to shrink it down. Another thing to consider - most ski specific or winter specific bags have ice axe loops you can use to strap your tools on, making it great for both purposes. Hope that helps!

5 5


This pack was a natural for me, first I think Osprey makes the best packs and I have discovered that their water bladders are top notch. I personally like them better than the CamelBaks.

Comfortable pack, the bladder does not make your water taste like plastic, a handy magnet holds the bite valve in place and enough room to store what you need for a day of riding. Well made pack.

Responded on

Hi Mike-

How you would describe the difference between the Osprey's bladders and the CamelBaks?

Responded on

Matt, Camelbak makes a fine product but I never had the plastic taste with my Osprey, the shut-off valve is included, the magnet holds the bite piece in place and the quality seems top notch.

Responded on

Also, the biggest different between a Camelbak and a Osprey reservoir is the framesheet on the back of the reservoir. It prevents barreling (so your reservoir doesn't become a sausage of water) and also gives you a little structure so that if you are carrying weight in a frameless backpack, you now have a moderate frame.

Responded on

So, for starters, Nalgene makes the bladders for Osprey. From the Osprey web page:
The reservoir design sandwiches an anatomically shaped molded plastic sheet between a layer of breathable nylon mesh fabric and the reservoir
back. This enables the reservoir to conform to the back’s complex shape,
even when full. The result is a more precise, stable and comfortable fit.
Additionally, the reservoir has a rigid handle/spine that stabilizes the load of the water while also serving as a more convenient design to slide the reservoir into.

5 5

I love this pack

First - I got this pack as a replacement for my Deuter Race X, which I also loved because they both have air flow in the back - a key feature for mountain bikers who climb and sweat hard. I wouldn't buy a hydration pack without the air flow.

I adore how light the pack is and that there are pockets on the waist band so I can easily access my camera, lip stuff, or nutrition.

The magnetic attachment on the sternum band is genius. No more floppy water tubes to worry about.

There is only one thing I don't like about this pack, and it has nothing to do with the pack and everything to do with the bladder. The bladder will leak unless you tighten the reservoir lid down with all of your might. I mean TIGHT. Nothing like heading out on a 4 hour ride with a wet back and butt - ugh - I learned the hard way. Occasionally the mouthpiece will leak on me as well when the bladder is really full.

My husband bought a similar Osprey pack, just the size up (larger capacity) and it fits him perfect. Mine fits me perfectly too, so Osprey has made some great adjustments on getting a pack to fit a XL guy and a M gal. Nice work!

Highly, highly recommended.

Responded on

The leaking reservoir (unless tightened beyond reasonable limits) is a known issue with a small percentage of reservoirs. Osprey's great guarantee will replace it with a better production run, though. You can fill out the form at the following location:

Responded on

As Brian posted, some of the early bladders had a faulty seal and unless it was cranked down it would partially leak through the threads. I believe the newer production models no longer have this problem. Osprey will replace it if you contact them.

5 5

Great hiking pack with H2O!

What an awesome stable hiking pack with hydration!

Great features like a rain cover, stowing place for poles, great pockets, and a killer ventilated frame with stays. Super comfy!


5 5

Osprey Packs Manta 20 Hydration Pack

The pack looks great, and has served its purpose well, which was to be a day-pack for my fiancé. To begin with:

Its features:

- The pack was well designed and is very aesthetically pleasing. She is about 5'2", and a very small person, so she didn't want a pack that would swallow her up. After much searching and deliberation, we decided to give the Manta 20 a try.

- My fiancé, which is the primary user of the pack, is a very small woman, and has a short torso. One of my chief worries was that it would not ride comfortably on her shoulders and hips, but it adjusted really well, and after a few small adjustments and a couple of miles of hiking, she got it pretty comfortable.

- The included rain-fly in the bottom compartment is awesome! It started to drizzle on us while we hiked, and it was easy to get to and stayed very well on her pack without inhibiting the use of the hydration system or anything else, and it was easy to shake out and put back in its compartment.

- The hydration system has good volume and rides well, however, it isn't made to easily remove the straw, and thus makes removing the bladder a little more difficult, and is a little harder to clean than some which have large top-opening features.

The waist-belt isn't the most comfortable. At the clasp-point, it is a standard nylon belt, which can start to rub over long distances, but for standard day-hikes, it is tolerable. The waist belt has hip-pockets which are real convenient.

Its Storage:

- As far as storage, I would recommend that this pack be limited to day-hikes. In her pack, we were able to get a lunch, a climbing harness, climbing shoes, and belay device, and a chalk bag, but that took up almost all the storage space there was. If you are a gear minimalist, this pack could be just right for you.

- There are a variety of compartments, and the zippers are sturdy, hold their position well, and move smoothly and easily when being operated, which is a great plus. The external compartment worked well for stuffing her rain-jacket down in during the periods of sunshine that we had during the hike, and is easy to access.

- The hip-pockets on the waist-belt are real convenient, easy to access, and are good for storing small things that you might need more frequently like keys, band-aids, extra batteries, chapstick, etc.

- The gear loops on the outside of the pack work well for clipping carabiners to, which allows further external storage, or, like myself and my fiancé, it allows us to clip the quick-draws for our climbing to them without too much aggravation.

Would I recommend this pack? Definitely. Osprey makes a good product, and if you know how to utilize it best, it can be a very satisfying purchase.