Description of Arcteryx Alpha LT Jacket - Women's The Arcteryx Alpha LT is the tool of choice for the fast and light alpine crowd. Tough GORE-TEX® Pro Shell serves up full weather protection and is further enhanced by our technical features. Lightweight and supple, this alpine focused jacket features an improved Storm Hood and the harness HemLock keeps the jacket hem from rising above a climbing harness. Arcteryx + Gore-Tex = Amazing. Features: Laminated high-strength hanger loop GORE-TEX® three-layer construction Tiny GORE® seam tape (13 mm) Micro seam allowance (1.6 mm) reduces bulk and weight One-hand adjustable drawcords Articulated elbows No-lift gusseted underarms Helmet compatible Storm Hood Stealth hood adjusters WaterTight™ external zippers Molded zipper garages Laminated pit zippers allow for faster venting Full front zip with wind flap Internal chest pocket with laminated zip Two high, crossover hand pockets with laminated zippers Removable HemLock™ inserts keep jacket in position under harness