WIDE APPLICATION: These cinch pull string backpacks can serve as traditional backpacks, gym bags, travel cinch bags, and bags when you go to schools and supermarkets, suitable for home storage. Our drawstring bags can hold the inside items well. Let your life add glamorous colors every day, increase the sense of energy and entertainment. QUALIFIED MATERIAL: Draw string sport bags made of High-Density polyester fabric with PU leather reinforced corner. Our large string bags are not easy to tear, and comfortable, durable material and good quality can prolong the sports backpacks' life. LARGE CAPACITY: Drawstring backpack bags bulk measures 22.4” L x18.1” W, perfect size for carrying items like exercise clothes and shoes, towels, water bottles, books and notebook or other school supplies, other various snacks. DRAWSTRING BAGS DESIGN&LIGHTWEIGHT: There are two straps on each side, and the bottom corners are reinforced with triangle PU leather with two metal grommets. You can drag the string to close the sinch sack, and then it can be a backpack. The cinch backpacks can also free up your hands and help you reduce your shoulder burden. Our black gym sack bags are lightweight enough to make you feel relaxed. DIY ART FRIENDLY: Our polyester cinch sacks are heat-resistant, so you can do heat transfer printing and DIY painting on these string bags. Your design will give the sackpacks different, meaning what will become the best gift for you or your family and friends. Make your life more colorful and creative.