These backpacks are great for carrying all of your essentials. Can be used for hiking, on the beach or traveling. There is a waterproof wet pocket in the main compartment, the zipper is on the back of the backpack that leads to the internal wet pocket, This is a great place to store wet or sweaty clothes or towels. This backpack is made of a high quality tear resistant nylon fabric. There are breathable mesh shoulder straps to help with padding for a comfortable carry.