Ready for everything from sprinkles to a deluge, this completely waterproof pack employs a roll-top design to keep water out.  |   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)     Capacity: 1,600 cu.in./26.2 L     Weight: 2.5 lbs./1.49 kg      Bags not intended for use by children 12 and under.