420D nylon with TPU film laminate Waterproof main compartment with roll-top construction Easy-access removable laptop/tablet organization sleeves Removable high visibility liner Organization panel with two zippered pockets Quick-access, water-resistant front zippered stash pocket Ultra-padded air mesh back with Air Flow System Off-center removable hip belt Dual Density shoulder straps Two-way adjustable sternum strap Strap containment system to ensure all straps are secured Laptop sleeve: 14.5"h x 9.75"w x 1"d; fits most 15" laptops Dimensions: 20.5"h x 10.5"w x 6.75"d (rolled)