Material: It's made of high quality oxford cloth, not easy to absorb water, it's kind of waterproof. Classic appearance. Durable, well-made, compact, spacious, and deformation is not easy. About Charging Channel: There is side pocket with zipper which is an external USB charging channel or earphone cable hole, you can charge your phone when holding phone in hand while your power bank in the pocket, or you can listen to music while your phone in the pocket.