Gamma Series: Highly breathable textiles with stretch and differing degrees of thermal efficiency that can be worn as water-resistant outer layers. High degree of abrasion resistance. SL: Super Light. Uses the lightest weight materials available to provide high weather protection, performance and/or packability, but with the right amount of durability. Built to move fast, the Gamma SL Hoody uses a hybrid construction combining durable, weather-resistant Fortius(TM) 1.0 fabric in high-wear areas and lightweight, quick drying, air permeable TerraTex(TM) fabric in the main body. The result is a softshell hoody hardwired for weight conscious alpinists moving quickly over mixed terrain. Features: Weather resistant Snow-shedding Breathable Lightweight Durable DWR finish (Durable Water Repellent) helps bead water from fabric surface Stretchy fabric construction provides freedom of movement Hybrid technology-combining materials to enhance functionality and performance Anatomical shaping for fit and comfort Articulated patterning for unrestricted mobility Gusseted underarms Adjustable hood drawcords Laminated brim Helmet compatible Storm Hood(TM) Corded zipper-pulls reduce noise and are easy to grab Soft laminated chin guard Full length Vislon front zip with windflap Adjustable cuff with Velcro(R) closure Drop back hem Harness HemLock(TM) inserts keep jacket in position under harness Chest pocket with laminated zip Two hand pockets with laminated zippers Athletic Fit, Hip Length Weight: 370 g / 13.1 oz Activity: Rock Climbing / Alpine Climbing Materials: Fortius 1.0(TM)-84% nylon, 16% elastane, 160 g/m . Lightweight, durable, non-insulated, stretchy nylon/spandex blend textile. TerraTex(TM)-94% nylon, 6% elastane blend. Lightweight, breathable, stretchy, quick drying plain weave textile