[Waterproof External Surface]: The main body of this gym bag is made of high quality tear and water resistant polyester fabric. And the PU external bottom provides double security to resist water. No need to worry when you go swimming, to beach, or in rainy day [Waterproof Shoes Compartment]：There is 1 big shoe compartment for sneakers. It perfectly keeps your shoes or dirty clothes separate from your clean items. And the zipper is on the external to prevent water from leaking out of the zipper. The two venting holes which are on the cover makes the shoes compartment breathable and eliminate any odor [Wet Pocket] The hidden wet pockets are designed to pack in your wet accessories.It can place wet towel, bath towel, wet clothes, umbrella and so on