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  • Mammut - Biwak Light Jacket - Women's - Cyan
  • Mammut - Biwak Light Jacket - Women's - Black
  • Mammut - Biwak Light Jacket - Women's - Pink

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  • Mammut - Biwak Light Jacket - Women's - Cyan
  • Mammut - Biwak Light Jacket - Women's - Black
  • Mammut - Biwak Light Jacket - Women's - Pink

Mammut Biwak Light Jacket - Women's

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    7 Reviews


    Play "Red Light, Green Light" all day long in this lightly insulated jacket.

    The itinerary for your ice climbing tour of Norway has been finalized, and you just need to go over the gear checklist on more time. Softshell and midlayer? Check, as you have the Mammut Women's Biwak Light Jacket. This innovative piece of outerwear exploits new insulation technology to give you a lightweight, warm, and breathable puffy-style jacket without the extra puff factor. You can squeeze through small spaces or layer up when snow eddies cloud your vision, and you can do stop-and-go all day long without getting overly heated or sweaty.
    On the outside, the Biwak combines water- and wind-resistant Pertex Quantum fabric in the front and back with Polartec Power Stretch Pro side panels. Your innards stay toasty, but you can still comfortably reach high for a hold or lean over to secure your crampon. Throughout the front and back, Polartec Alpha insulation works its magic to keep you warm without adding weight. This insulation uses high-loft, low-weight fibers in a low-density knit to give you a highly breathable insulation so you won't get sweat-soaked and then shivery when you stop mid-way up the mountain; make speed hiking a new sport and not fall prey to overheating, as this jacket lets the outside air in to keep the heat at a minimum.
    Don't be fooled by the puffy pigeonhole—the Biwak Light sports a slim silhouette so you can layer over it when you need waterproof protection. Thumb loops at the end of high-reach sleeves accommodate overhead movement. Two side pockets and a chest zip pocket give you on-the-go storage options so you don't have to stop and drop your pack every time you want a snack.

    • Pertex Quantum shell
    • Polartec Power Stretch Pro side panels
    • Polartec Alpha insulation
    • Athletic fit
    • Thumb loops, high reach sleevee
    • 2 concealed side pockets, 1 chest pocket
    • Item #MAM0870

    Tech Specs

    Pertex Quantum (nylon), Polartec Power Stretch Pro (50% polyester, 40% nylon, 10% elastane)
    Fleece Weight
    2 zippered side, 1 zippered chest
    Claimed Weight
    12.7 oz
    Recommended Use
    casual, hiking & camping
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

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    Nice for taller women

    • Familiarity: I returned this product before using it
    • Fit: Runs small

    I had my eye on this jacket for a while and finally ordered it when it went on sale. Unsure of size, I ordered an XS and a small. The XS fit like second skin, which was not what I was going for. I'd hoped the small would work, but the sleeves and overall length of the jacket were much too long. I have long legs, short torso, and short to average arms. It is a very nice jacket though, and I think this would be great for taller women, so I'm still giving it 4 stars even though it didn't work for me..

    Awesome Jacket

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Medium

    This jacket is fitted, however, there is stretchy fabric on the sides underneath the arms which make is SO comfortable. My arms don't feel restrained when wearing it. I haven't taken it off since I got it!

    Beautiful jacket... but NOT for climbers

    • Familiarity: I returned this product before using it
    • Fit: Runs small
    • Size Bought: XS

    Such a letdown having to send this jacket back! It's slim-fitting, flattering, and warm (and it has thumbholes)! I really tried to make it work, but the range of motion in the arms and shoulders was just not workable.

    I'm pretty thin for my height (5'6" & 115 lbs), but this jacket was actually constrictive in the shoulders. It's probably fine for non-climbers (I think the other rave reviews are by skiers/snowboarders), but if you need to stretch your arms up over your head, I'd look at The North Face, Rab, and Arc'teryx.

    Best. Jacket. Ever

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: small

    I have had this jacket 2 years now and am considering purchasing a backup, just because I love it so much. I have used this both as a midlayer and as an outerlayer on blue bird days. I'm tall at 5'10" and the sleeve length is perfect for me. The thumbholes are great for layering up, and the chest pocket is large enough for an iphone and some shot blocks.

    As a midlayer, this jacket is unbeatable. The insulation is strategically placed on the front/back torso and the top of the arms. Along the underarms and ribs there is high quality fleece, which gives you the perfect combination of warmth and breathability. On cold days I ski in this and a shell and feel great.

    As an outer layer this jacket also does well. It has some light water repellancy, and dries fairly quickly, but is most certainly not waterproof, and will water log quickly in a downpour. It offers some protection from wind, but of course, is not a windproof shell.

    All in all, this is my go to jacket for all adventures.

    Best. Jacket. Ever

    Warm, attractive, multitasking jacket

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: XS

    I love this jacket, and i wear it a lot both as a mid and outer layer.

    What i love about it:

    1) it's warm but not bulky. The material on the sides and under the arms is thinner, stretchy and breathable, so it lets heat escape, keeps you moving well and there is no bulk

    2) it's really nice and hot as a midlayer in ski season, but it's also great as an outer layer the rest of the time since it's also windproof

    3)It's slim fitting and true to size (sometimes mammut runs large, but not in this jacket). Good pockets too.

    4) Looks fabulous on, good lucking picking just one color....

    Note - i didn't find it especially water resistant. It definitely gets wet fast without a shell over it.

    Photo - exploring the Alta Lakes ghost town on a chilly, cloudy day. Telluride, CO

    Also wearing prana halle pants:

    and pamir boots:

    Warm, attractive, multitasking jacket

    Another one I wear all the time.

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Small

    I love this jacket. It is so hot. Like in sharp looking. I have the black color.

    This one has been used so much this season as both a mid-layer under shells for snowboarding, as an outer layer for warmer cross country skiing, out and about on the town.... It is a really classy looking yet highly functional jacket.

    The fit is ideal, with longer sleeves and on the slim side. Polartech stretch on the side panels helps to regulate heat so you are not over-toasted. Thumb holes are perfect length so they aren't digging into your hand. Good amount of pockets and the collar is slightly higher than normal to help keep your neck warm. Seems to be withstanding heavy use so a high quality yet very good looking jacket.