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Every experienced outdoorsman always has a few 'uh-oh' items on hand when out in the backcountry, and the Mammut Wing Half-Zip Jacket should be a staple of this go-to kit. Built to be extremely light and packable, this pullover will have you breathing a sigh of relief when you pull it out after the weather starts to head south when you're halfway up a multi-pitch project.

  • Ultra-lightweight nylon fabric resists wind and water, encourages natural ventilation, and allows the jacket to weigh in at just over three ounces
  • Packs into own chest pocket for unsurpassed convenience of storage
  • In packed form, can easily strap to a climbing harness for quick access

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Here's what others have to say...


Great for mountain life

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

Great little jacket to stash for those days when the weather looks like it could get a bit nasty or if you're planning on gaining some elevation and worried about the cold wind at the top.

Fit is great but only problem I have run into is that with the half zip, it can be hard to get into and out of if you have wide shoulders. Takes a bit of wiggling around but well worth it to have a nice fit that's not too baggy. Seams seem to be strong and I have had no issues yet with squeezing it over my shoulders.

Stows nicely in the chest pocket although you could probably stow it in a space 1/3 the size of the pocket. I'd say the entire jacket can be compressed down into a size smaller than a deck of cards.

The perfect companion if you're looking for something quick and light to throw on when the weather gets cool or the wind picks up. Incredibly easy to stash in a pocket, camel back, etc. and weighs almost nothing!!


Simple and light!

    Haven't used this in the field yet, so I'll just comment on the sizing. I'm 5'8"/150lbs with a 40-inch chest and the Medium fits perfectly with enough room to layer a micropuff-style jacket underneath. Seems to be good quality and fabric. Was looking to add to my UL backpacking arsenal and this might be just the ticket.