JanSport Trail Series Big Bear 63 Backpack polyester Ergonomic S-curve shoulder strapswith Top-loading main compartment with compression hood Sliding harness adjustment and HDPE framesheet with mono 6061 tubular stays with Dual side water bottle pockets Mesh wet/dry pocket with Daisy chain quick clip points Haul loop with Dual zippered pockets and Bungee compression with Ice axe loop Capacity:3602.9 cu in / 59.04L,Dimensions:28.5in h x 11.5in w x 10in d,Weight:3 lbs 3 oz / 1.47 kg