Adjustable Strap You can adjust to any length, not loosen, and have multiple ways to wear. Durable Zipper The zipper does not get stuck. It is smooth, strong, durable, and can be used for a long time. Smooth Buckle The buckle can be easily opened and plugged in, making it easy to wear. Waterproof material Make of durable water-proof nylon material , protect items getting wet from sweat, but please don't immerse it into water. Big Capacity The belt bag is stylish and sophisticated, and has a large capacity inside. There are grids in the inside, which can better classify things so that you can find things faster. Back Zipper Pocket Secure back zipper pocket to hold your belongs like key, passports, ids, cards while traveling or workout.