Marmot Biospan Eiger 36 Backpack Orange Black Hiking Camping Climbing Pack Frame Top-loading with three convenient pockets in the removable lid: zippered top pocket, internal mesh pocket and pocket under lid Removable 3-D DriClime® mesh hipbelt offers lightweight load distribution with maximum breathability, keeping you comfortable Marmot's BioSpan™ load-transfer system properly distributes weight over your back's middle area and lumbar region for load-carrying comfort Ultralight Frame System with HDPE and an aluminum center stay provides an optimal blend of stiffness and torsional flex while supporting heavy loads Compression-molded backpanel and dual-density shoulder straps give you one of the highest levels of comfort and durability Pocket for hydration reservoir lets you haul enough water to keep you hydrated during intense activity and on warm days (reservoir sold separately) Dual ice axe loops with lash straps allow for easy access to tools and equipment Four side-compression straps stabilize pack load and double as a ski carrying system for winter outings Coombs carrying system lets you carry skis diagonally across the back of the pack High-tenacity nylon provides excellent abrasion resistance and tear strength for long-lasting durability Constructed of 420-denier Broken Twill Nylon and reinforced with 840-denier HT Nylon Specifications for torso/ waist and hips/ base volume / weight are as follows: • Medium - 18 - 20 in. / 20+ in. / 2,200 cu. in. / 36 liters / 3 lbs. 1 oz