jntworld Waterproof Bike Saddle Bag under Seat Bike Bag Mountain Bike EVA Nylon Shell Cycling Tail Bag The water-repellent material and EVA Nylon Shell ensure that the Wedge Pack can withstand even harder rides. Extra Storage: Designed to fit under your bikes seat, this bike seat bag will make your daily essentials much easier to carry around when youre cycling. Adjustable belt: Adjust the belt and shut the buckle, and the bike saddle bag is installed. You can adjust the belt until the bag is sturdy. Simple design with good appearance: Double zipper with wide mouth, it can convenient for riders to open while riding. Shape likes a shell, it is not easily deformed. Applicable: It can storage your phone, keys and napkin. It is very suitable for bike and mountain bike.