Size and Volume 1830 cu. in. (30L) Pockets Large main compartment fits books and binders. Secondary compartment with organization Mesh side water bottle pockets Material 600D Polyester, 1200D Polyester Features Flexvent™ injection-molded shoulder straps Comfortable, stitched foam back panel Removable hipbelt Exterior key/accessory clip Material: Polyester Bag Volume (L): 30 Bag Volume (cu in): 1830 Ski Carry: No Snowboard Carry: No Hydration Compatible: No Hydration Reservoir Included: No Laptop Sleeve: No