The Black Diamond Highline Stretch Shell is Black Diamond's most versatile 3-layer mountain shell in Black Diamond's collection. The HighLine features Black Diamond's premier BD.dry waterproof/breathable protection with a backing fabric to help regulate core temperature as you move. With fast and light movement in mind, the Highline is built to move with you, and features an adjustable hood, shoulder seams with added range of motion, and a lowered neckline to facilitate movement with a pack on. Two chest pockets, two hand pockets, one interior stash pocket, and pit zips round out the feature set on this alpine shell built for the mountains.