The swim drawstring bag is designed with a dry wet separation pocket, made of premium PVC material.There is an inner waterproof PVC zipper pouch and it's big enough to hold your valuables such as cellphone, sport watch,wallet to protect your item from water. The beach bag measures 18.9*12.6 inch. Main large compartment is for holding your clothes, towl, daliy supplies,etc.Two front mesh pocket is convenient for you to store swimming goggles and water bottle.The top secure barrel-lock closure provides quick and easy access to your gear.The shoulder straps can be adjusted to the length you need. Backpack design frees up your hands.Wider and sturdy thick straps relieve your stress.You can use it when you go to swimming, biking, camping, hiking, pool, beach, gym, or dance, sports,etc.