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. SV: Severe Weather. Employs the most durable materials for prolonged use and provides the most weather protection in the harshest weather conditions. When you get serious about bagging peaks, you'll get serious about bib pants. These chest height pants cut of ultralight, super-breathable GORE-TEX Pro, face down the most severe weather and conditions. High back keeps out snow, drafts and retains essential body heat. Features: Waterproof Breathable Durable Taped seams for added weatherproofness Micro-seam allowance (1.6 mm) reduces bulk and weight Articulated knees and seat Gusseted crotch Side zippers stop below harness/ hipbelt area WaterTight(TM) through-the-crotch zip WaterTight(TM) 3/4 length leg zippers Zipper garages to protect zipper closure from snow and rain Adjustable pant cuffs with lace hook Laminated waist drawcord Two pleated bib pockets with laminated zippers 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 Keprotec(TM) instep patches provide superior protection against damage by boots, crampons and ski edges High-cut breathable stretch-woven bib Quick adjust suspenders Athletic Fit, with e3D patterning Weight: 570 g / 1 lb 4.1 oz Activity: Ice Climbing / Alpine Climbing Materials: N80p-X GORE-TEX(R) Pro 3L N155p-X GORE-TEX(R) Pro 3L- Exclusive to Arc'teryx and engineered for high impact and abrasion resistance, this fabric plies together multiple yarns in an Ottoman weave for maximum bulk, ruggedness and durability. Fortius 1.0(TM)-84% nylon, 16% elastane, 160 g/m . Lightweight, durable, non-insulated, stretchy nylon/spandex blend textile.