800 and 840 denier nylon fabrics with foam padding insulation and Duraflex/YKK hardwear. Wide, padded, adjustable ahoulder straps with adjustable sternum strap and waist belt stabilizer for wearing comfort. The 68oz (2L) bladder has an anti-siphon bite valve. Hose routes inside the shoulder strap and can be secured to the shoulde strap with an easy to relocate retention clip. Speed zip access to bladder and pleated exterior storage pocket with elasticized entry. Demensions: • 16"/40.6cm(H) x 5.5"/14cm(W) x 1.625"/4.1cm(D) • Vol: 143in(cubic)/2343cc • Dry Weight: 0.7lbs./318g • Bladder Volume: 68oz/2L