Stretchy insulation. Built for moving. The Helium Stretch Insulated Jacket is built for the up and the down. Stretch nylon shell moves with you while skinning or on technical hikes. Synthetic insulation stays warm even when you work up a sweat. Low-bulk 40g insulation adds warmth while remaining highly breathable during intense efforts. When you don't need it, it packs into its own pocket. The [ak] mid-layer that earns its spot at the resort, and in the backcountry. Features: Stretch nylon for unrestricted movement skinning, hiking, or riding. Synthetic insulation keeps you warm and dry, even when it gets damp from sweat or wet snow. Stows in its own pocket. Always a reason to bring it. Burton stands behind this one.