Durable: This gym sack bag is made of waterproof, soft oxford, polyester, easy to clean, recyclable, water resistant, allowing you to put your towels and wet clothes in your swim bag without leaving behind. The fabric is blended with bright yarn for a more beautiful look. Large capacity: sports backpack lightweight 13x16.8 inches, protect and organize your equipment, whether it is in school, gym, office, clothes, towels, slippers, hats, glasses, wallets, cups, shoes, bottles, an umbrella ,a few books, lunch or clothes. Adjustable, unrestricted: drawstring bag for women with adjustable thick straps, soft allows you to avoid shoulder pain, free hands, increase carrying capacity, easy to adjust the actual size of the bag, easy to carry. It's more convenient to use a band seal to keep your stuff safe. An internal zip pocket: The backpack bag includes interior fabric with zip pocket for placing your belongings, key, credit card, sports watch, wallet, cell phone, gloves, earphones or private and important items to prevent pickpockets in any public place. Or damage inside the gym bag. Multi-purpose: for sports activities, unisex, suitable for training, running, yoga, swimming, camping, hiking, training schools and physical education classes, such as gym bags, shoe bags, swim bags travel, beach, Disney trip, swimming, As well as handbags, daily bags, schools, shopping, parties, etc., it is also a great gift for cool girl birthdays, child safety sports, sports promotions, fair prizes, teacher gifts, etc. Color: Black