The Chrome Ivan Rolltop Backpack is their largest, 100% welded-waterproof rolltop backpack and part of the WWII inspired Militia line. Chrome made the original Militia bags to haul wetsuits and beer to and from the beach. All Militia bags feature a 100% welded-waterproof main compartment that can hold ice-cold beer and keep your stuff dry in a downpour. A zippered compartment keeps wet/dry separate. Outside pockets with stainless-steel hardware store the small stuff.