Constructed with 3-layer GORE-TEX Paclite fabric and weighing only 305-grams, the ALPHA SL is a feather-weight, compressible, and entirely waterproof jacket for alpine adventures. It comes in a trim-fit with e3D, which features articulation in critical areas for enhanced mobility. It comes with HemLock inserts that secure to your harness and are removable. The helmet-compatible StormHood is adjustable and designed to move with your head when worn over your helmet. The front zipper and single exterior chest pocket are WaterTight. A stuff sack that features a clip-in loop.