Large coated storage pocket allows you to store gym clothes or a bathing suit without moisture or dirt spreading to the rest of the bag Tough, oversized wheels and the V-tubing telescoping handles glide with ease on any terrain Bag design absorbs the impact of travel with its durable, molded polycarbonate back panel Interior compression strap system helps keep items in place while exterior compression straps help reduce the overall size of the bag Exterior zipper sliders can be locked together for added security (locks sold separately) Outer shell fabric and lining are made of 100% recycled polyester from recycled plastic bottles, while the polycarbonate back panel is made of 50% recycled material 600D waxed canvas shell fabric is highly durable, repels moisture, dirt, and stains and includes a water-resistant coating free of PFCs, chemicals that can be harmful to the environment Built in ID card slot simplifies identification of bag bluesign is a strict international criteria that ensures the protection of workers, consumers, and the environment