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Mammut Guye Jacket - Men's Video

Built for backcountry skiing or other aerobic activities in cold weather, the Mammut Guye Jacket is insulated with puffy Polartec® Alpha® for superb warmth at a very low weight.


  • Because Polartec Alpha is more stable than other types of synthetic insulation, thinner backing fabrics can be used to increase breathability and save weight
  • Stretch-fleece panels along sides of body and arms enhance mobility
  • Stretch cuffs let you push sleeves up on your arms
  • Inner mesh drop-in pocket stows a hat or gloves
  • Zip hand pockets and zip chest pocket with media port
  • Collar has a small elastic loop for channeling earphones
  • Zipper garages and easy-grasp zipper pulls


Photo of Matt Preece, REI category merchandising manager

"We tweaked every piece of our exclusive Mammut collection until it made absolute sense for our customers."

Matt Preece, REI Category Merchandising Manager

View all Mammut Men's Synthetic Insulation Jackets

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Best Use Backcountry Skiing, Hiking, Climbing
Fabric Nylon
Lining Fabric Synthetic taffeta
Insulated Yes
Insulation Type Synthetic
Insulation Polartec Alpha polyester fibers
Hood No
Back Length Hip-length
Gender Men's
Average Weight 13.1 ounces
A pen and ink illustration of the Swiss flag flying atop the Alps

The mammoth of all collaborations

Together, REI and Swiss mountaineering pioneer Mammut designed a European-styled collection that features technical details for an awesome value. Only at REI.

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REI's guarantee doesn't cover ordinary wear and tear or damage caused by improper use or accidents.

If your item has a manufacturing defect in its materials or workmanship, you can return it at any time. See our limited warranty.

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