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Lightweight and insulated, this packable layer is built to breathe and stretch, so you can get after it in the mountains.
Shed layers for the climb. Add layers for the descent. The men's Burton [ak] Helium Stretch Vest is a lightweight layer that can do it all. It breathes while you're headed uphill and offers needed insulation under your shell on the descent. When the sun shines and the temps rise, it packs into its own pocket for easy stowing.
Waterproofing
Warmth
DETAILS
Regular fit is just right: Not too tight or too baggy
Stretchy, breathable, and lightweight nylon plain weave fabric
Thermacore stretch insulation (40g) for focused warmth and enhanced breathability
[ak] DWR coating
Lightweight low-profile back of hem cinch
Pocket utility loop and media port
Reflective details
Packable into a pocket
Zippered chest pocket and hand-warmer pockets