Made from 100% PVC with a 100% polyester 1680D secondary shell. Features waterproof construction, adjustable chest and waist straps, breathable mesh back padding, contrast zipper and webbing, hydration bladder compatibility, a laptop compartment for laptops up to 17 inches, a media port, key clips, multiple two-way zippered compartments, a reflective back panel, side compression straps, and water bottle pockets. Capacity: 26 liters (1,563 cubic inches)