Alpha Series: Climbing and alpinism focused pieces: harness compatible length and waistline; chest pockets accessible while wearing a pack or harness; maximum articulation for overhead motions; helmet compatible hoods; drop hem; highest possible durability-to-weight ratio; emphasis on lightweight materials. FL: Fast & Light. Minimalist garments designed to be very light with high performance, for traveling fast and light in variable weather conditions. A hardwearing, minimalist alpine shell designed for those wanting to travel fast and light in the mountains. The lightest and most breathable alpinist waterproof/breathable jacket in the Arc'teryx line, it has a clean feature set and trim fit to keep the weight and packed size to the minimum while providing uncompromised breathability. Features: Waterproof Breathable Lightweight Compressible and packable Micro-seam allowance (1.6 mm) reduces bulk and weight GORE-TEX(R) Pro three-layer construction Tiny GORE(R) seam tape Anatomical shaping for fit and comfort Articulated elbows e3D Ergonomic 3-Dimensional patterning for enhanced comfort and mobility No-lift gusseted underarms Trim fit for enhanced breathability Laminated brim Helmet compatible StormHood(TM) Externally accessed hood drawcords WaterTight(TM) Vislon front zip Cuff & Sleeves Configuration Laminated die-cut Velcro(R) cuff adjusters reduce bulk, and won't catch or tear off Adjustable hem drawcord Drop back hem Two-piece harness Hemlock(TM) inserts fold betted and keep jacket in position under harness Chest pocket with laminated zip Note: Arc teryx WaterTight(TM) zippers are highly water resistant, but not waterproof. We do not recommend keeping items in your pockets that may be damaged by moisture Includes stuff sack with webbing loop to clip to a harness Trim Fit, with e3D patterning, Hip Length Weight: 325 g / 11.5 oz Activity: Rock Climbing / Ice Climbing / Alpine Climbing Materials: N40p-X GORE-TEX(R) Pro 3L