NEVER RIDE WITHOUT IT The Small Seat Bag is large enough to hold a tube, multi-tool, and a few other essentials. Made from durable poly fabrics. Velcro straps connect to your bike's seat post as well as a cinch sack to keep everything rattle free. FEATURES Slim profile designed to fit under bike seat PU coated, 600D polyester main body fabric Hook & loop attachment for seatpost and seat rails DIMENSIONS 13 x 8 x 5.5cm Volume: 0.2L