FEATURES of the Arcteryx Men's Alpha SL Jacket Made with the lightest and most packable N40r GORE-TEX? fabric with Paclite? product technology Waterproof and breathable while offering a high level of comfort Ideal for climbers and alpinists needing emergency protection in sudden storms Mini ripstop construction provides added tear strength without impacting weight Helmet compatible StormHood? designed to provide the ultimate protection in cold or wet weather Laminated brim and hood adjusters secure tightly and deliver full coverage without restricting movement or visibility Tall collar with laminated chin guard offers full coverage Harness HemLock? insert is designed to keep your jacket from riding up when wearing a climbing harness. Insert can be removed when not needed No-lift gusseted underarms and articulated patterning for increased comfort and unrestricted mobility Laminated die-cut Velcro? cuff adjusters reduce bulk, and won't catch or tear off One hand adjustable drawcords in the hem and hood for quick and easy adjustments Zipper garages to protect zipper closure from snow and rain Micro-seam allowance (1.6 mm) reduces bulk and weight WaterTight? external zippers and full length front zip Includes stuff sack with webbing loop to clip to a harness Micro corded zipper pulls