The 1st Generation Patriot Backpack Cooler is built with 600D Polyester and a insulated plastic liner. The fully adjustable backpack straps are designed for comfort while gettin’ wasted in the worst condition. The Patriot G1 comes equipped with velcro on either side to allow for customization with velcro patches. The waterproof zippers and top pocket will help you conveniently access booze one handed. All backpacks are shipped from Northern Michigan and are designed in house by the SHITI Crew!