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Western Mountaineering Apache MF Sleeping Bag: 15F Down

Temporarily Out Of Stock

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Push the boundaries.

The Western Mountaineering Apache MF Sleeping Bag features premium 850-fill down and an efficient cut to help you push the limits of your three-season kit. Six inches of fluffy loft keep you cozy at night, and the breathable MicroLite XP shell repels moisture and lets body vapors escape so your warmth-giving down insulation stays dry.
  • Highly breathable, water-resistant MicroLite XP shell protects the down insulation from frost, condensation, and spindrift
  • Ultra-premium 850-fill down insulation retains your body’s warmth and provides a higher warmth-to-weight ratio than any synthetic-fill insulation
  • Interlocking draft tubes and a down-filled collar prevent energy-sucking drafts from zapping your slumber
  • Narrower shoulder girth helps eliminate pockets of dead air for improved warmth retention
  • Western Mountaineering bags are made in the USA
  • Item #WES0043

[shell] MicroLite XP, [lining] nylon
850+ fill down
Max User Height
[short] 5ft 6in, [regular] 6ft, [long] 6ft 6in
Shoulder Circumference
[short] 59in, [regular] 59in, [long] 60in
Hip Circumference
[short] 51in, [regular] 51in, [long] 51in
Foot Circumference
[short] 38in, [regular] 38in, [long] 38in
Bag Length
5ft 6in, 6ft, 6ft 6in
Fill Weight
European Norm Comfort Rating
European Norm Lower Limit Rating
Storage Sack
Stuff Sack
Stuff Size
8 x 15 in
Claimed Weight
[short] 1lb 14oz, [regular] 2lb, [long] 2lb 2oz
Recommended Use
three-season backpacking, alpine climbing, summer mountaineering
Manufacturer Warranty

Tech Specs

What do you think about this product?


>Rating: 5

Quality Bag that I'd expect from WM

I've put it through the wringer

I have lived my entire life in Utah and Colorado. I try to get out 30 nights a year backpacking. Warmth, weight, and packed size are all very important to me. I wouldn't use any other bag than an Western Mountaineering now that I have slept in one. I have used a Terralite(25 degree) for the last 3 years and it has been solid. I bought the Apache for my teenage son to use because he sleeps colder than me and so I could use it during the winter. We love this bag. I have used it for late season trips to Yellowstone and to winter trips to Canyonlands and the bag has performed perfectly. The Apache is a very warm bag with a great interior feel to it. The microlite material is strong and keeps moisture out really well. It is noticeable different than the WM extremelite material they use on their lighter bags. The draft collar works great. This bag has it all and does it all.

>Rating: 5

Buy It For Life

I've put it through the wringer

I've had my Apache bag for three years now and have used it all over the world. High quality manufacturing, attention to detail and a general level of excellence have solidified WM's place in my gear closet. From hut-to-hut climbing in the Austrian Alps to boon-docking in the Bridger-Teton National Forrest, this bag has seen it all. When sleeping on a mat, I find my position changes. Despite being a mummy bag I can comfortably sleep on my back, side and stomach. Roomy enough for comfortable movement, but not so spacious that you'll be warming excess dead space. Be sure to add a liner as a barrier between bare skin and the bag - this will help with loft of the down between washes. I expect to have this bag with me for a long time to come.

>Rating: 5

WM quality and warmth

I've put it through the wringer

I used this bag for the first 600 miles of my AT thru hike in 2015 and it performed flawlessly. I saw a few nights in the smokies where it got down to 9 degrees and snowed. I was warm and slept well while other hikers in 15 degree bags shivered through the night. I was warm because I used the continuous baffle construction to push more down on top of me, as well as keeping a warm water-bottle inside my bag. Once I got north of Mount Rodgers in VA, it warmed up quite a bit, and I found myself doing the opposite, pushing the down under me and keeping less on top while I waited to switch to my WM summerlite 32 that I used the rest of the trip. Western Mountaineering is the best of the best, and I make no compromises when it comes to my sleep in the backcountry. These designs work, and the quality of down alongside american construction is well worth the premium price point for any serious outdoorsman. If you are looking for a bag in the 15 degree range, look no further.

Elliot, you are my kind of gear user! Thank you for your detail here on the Apache. Leta Western Mountaineering Rep

>Rating: 5

Warmth, Loft, Compactable.

I've used it several times

Got 5 nights in this bag an already feel like it has paid for itself. With 850+ fill it packs down small, and then lofts up incredibly. Crawling in a dream. Great easy to manipulatre draft collar and hood synch, plenty of room to move, but cozy enough to move with you in the night.

>Rating: 5

Best Bag I've Owned

I've used it several times

This thing is sooo warm, roomy, and no zipper snags! My favorite bag that I've ever owned.

>Rating: 5

Close to the best out there

I've used it several times

If you want the best 15d bag, it's either this one or the ff version. I have a few WM and ff bags, and they're pretty much same as far as quality goes, with the exception that I think ff down is a little better, but this is not based on any scientific analysis I've made, just observation. I've used this bag down to 0 f with no chills, so it's a pretty darn good alpine bag I think. With compression sack, able to get to 2-3 L in size. I use vapor barrier on 2+ day trips, or if need to get more warmth out of bag.

I hear that FF and WM get their down from the same company. FF does, however, have better sizing options for every temperature rating, whether you're a woman, skinny man, fat man, tall man, whatever.

>Rating: 5

Bought an WM Apache in 2001, still going

I've put it through the wringer

I bought a WM Apache bag in 2001 and am still using it as my everyday bag. I'v probably put in over 1000 nights in it all told, from hot summer river trips to shoulder season backcountry ski outings to countless days on the trail. The bag is the best, I highly recommend it. Get it overstuffed for an extra 25 bucks or so.

What do you mean by "get it overstuffed"? Who and where, why?

Peter - WM will "overfill" the bag for you. They add extra fill. Why? Because. More fill equals more warmth...or more importantly, more time before it needs to be filled again.

>Rating: 5

Great bag

Expensive but worth it. Tall/slim guy and bag is quite roomy - no claustrophobia here! Bag is red on top and black inside and on the bottom, looks great. Zipper works well and can be opened at the bottom for foot ventilation

>Rating: 5

Best Quality Sleeping Bag out there

I have had an Apache bag for about 2 years now and it is my go to. One feature that I would like to call out is the stiff lip that runs along the inside of the zipper which prevents snags. Snags are probably the #1 way to ruin your bag. Another thing I would like to mention is that when you buy a new bag, be sure to look at 'fill weight' as opposed to temperature rating which is defined by the manufacturer. You will notice that WM's bags come with a higher fill at a particular temperature rating when compared to North Face or Sierra Designs (note that both make excellent bags as well and offer features that surpass WM in some areas). WM bags also tend to weigh a little less than their competitors even with the extra fill. One last item worthy of being called out is that if you order directly from Western Mountaineering, you can get a left or right side zipper and add 2 ounces of overfill to your bag.

How do you contact WM to order directly? and I agree this bag and the Apache are the finest, most versatile bag you can buy. WM is a high-end product that's actually worth the clams.

How do you get the extra fill? I checked on, but I can't find anything on how to send them my bag for an extra fill.... Any ideas?

>Rating: 5

Western Mountaineering = +

All Western Mountaineering bags are super. This one is a narrow version of the Badger MF, which is at least 66 inches in the shoulders. If you're looking for a 15 degree bag (a conservative rating like the ratings for all their bags) that'll last the next 20 years look at this one or the Badger (depending on how narrow you like your bag).

>Rating: 5


I used this for my PCT through-hike, it was the one piece of gear that didnt fail, completely lived up to its expectations... Would definitely buy this bag again if i were doing the same thing


Can this sleeping bag zip down to the bottom and open out into a double bed like duvet cover? Thanks

The Apache is a mummy bag that unzips down to the feet but not around the feet so it does not open and lay flat as a comforter. I would recommend the Ponderosa MF for that use.


Hi, can anyone tell me how this fabric...

Hi, can anyone tell me how this fabric (MF) stacks up against the Pertex Endurance UL fabric? I am trying to decide b/w this bag & the Feathered Friends Lark (which is a bit roomier - not necessarily a good thing IMHO). I do want a water resistant outer shell, a must in SW Tasmania's fickle & often wet conditions. Any other comments on this bag would be greatly appreciated. Thanks in advance. Stuart.

The Microfiber material is ultra water resistant. It will shed water from the outside. In comparison, I'd say that Pertex is going to keep you drier from the outside. If you are sweaty (as most people are), Microfiber will keep you more dry from the inside--it breaths better than any type of Pertex layer. It all boils down to if you're in a tent--if yes, then the Microfiber will be plenty dry enough. If not, then the Feathered Friends bag may be the way to go as it will better protect your down from the elements.

I too looked at these and ultimately went with FF Snowbunting with 2 ounce overfill. I've been in it as low as 18 in underwear and t-shirt and its fine with good ground pads...


Can Apache be zipped together with an...

Can Apache be zipped together with an Alpine lite??

Yes they can. If you get different lengths (1 long and 1 reg) then one will be lower than the other, but the zippers are 100% compatible.


15f bag i am 6ft 1 50 inch shoulders...

15f bag i am 6ft 1 50 inch shoulders current mummy bag to tight .what size do u recammend

The Long Apache MF will give you the room you need.


I am interested in the Apache MF. I am...

I am interested in the Apache MF. I am 5"6" 148lb Am I cutting it to close getting the 5"6" bag?

The 5'-6" on the short bag is max user height, so yeah, right there. You would be more comfortable in the regular 6'-0" bag. It's nice to be able to hunker in a little and by the time you figure a few more inches for plantarflexion when you're on your back, you'll be better off going longer. Hope that helps.

Everyone I know who is close to the height of a Western Bag--6' or 5'6"--has been comfortable in that bag. I think with Western, the height rating is a comfort rating and not the straight length of the interior space. A 5'6" bag is built to fit a 5'6" person comfortably...


I have this bag... and love it! I want...

I have this bag... and love it! I want to get one for my girlfriend as well. I see there are left and right zip options. My question is: will the left and right zip bags zip together?

They'll zip together, but only partway down since it's not a full length zipper. Your feet will still have to be separate, so if you're hardcore cuddlers this might not work.

Yes, and you can couple it with pretty much any Western Bag. But your feet will be separate as Angus says above because the zip does not go around the bottom on this one.. Have fun! ;-)


I am looking for a sleeping bag for...

I am looking for a sleeping bag for Australia, with a tempereture range of 10 degrees dowm to -10 degrees. Any help.

I have two Western Mountaineering sleeping bags & in my humble opinion, there is no better bag on the market. On the down side they are $$$. Depending on your usage, purchase a WM bag to get many years of comfort, warmth, & service. I have the Antelope & would highly recommend it for your intended purpose however you might have to layer up a wee bit for -10. Here's more information:

I agree with Jeff, I would get the Antelope for ranges of 10 degrees to -10. Western also does an overfill (and I believe its 3-4oz more for this model bag). Accordingly, this will lower the temp rating a few degrees (conservatively). I would look into that option if getting this bag for your situation.