Men's Jacket Outer: Stretch Breathable Lightweight 20D Nylon/Spandex Plain Weave Water-Repellent Coated Fabric Lining: Stretch Breathable Lightweight 20D Nylon/Spandex Ripstop Water-Repellent Coated Fabric Thermacore stretch insulation [40g] [ak] DWR [Durable Water Repellent] coating Slim fit Attached hood with stretch binding at opening Lightweight low-profile back of hem cinch Pocket utility loop and media port Packable into a pocket Zippered chest pocket and hand-warmer pockets Reflective details  Burton Men's [ak] Helium Hooded Stretch Insulated Jacket delivers breathable warmth in a lightweight, pack-friendly design for backcountry missions.  Its stretch fabric lets you move naturally while keeping things light and breathable.  It's the midweight layer you can wear on the uptrack when it's cool and breezy or under your shell to stay warm on the descent.  When the sun shines and the temps rise, it packs into its own pocket for easy stowing.  The slim fit sits close to the body, with room for the garment to move with you. Burton Men's [ak] Helium Hooded Stretch Insulated Jacket