This Expandable Waterproof Backpacks With USB Charging is the perfect size bag for carrying all of your essentials. With the expanding waterproof design, you can fit your extra clothes, shoes, and electronics inside the bag. You'll never have to worry about water getting inside of your bag again. On the outside of the bag, there are two pockets, where you can keep whatever you want to. This backpack is perfect for outdoor adventures and all-around everyday use.