Sunlite Gator Gripper Seat Bag. 49 cubic inches of storage, Strap on to underside of seat with attached Velcro straps. Water resistant 600 Denier Polyester, Large 3M reflective trim, Seat mount. This type of seat bag will work with seats that have springs on the underside. Good size bag for a patch kit and spare tube or wallet and keys. Free shipping on orders over $100! Al's one-liner (A mouse trap, placed on top of your alarm clock, will prevent you from rolling over and going back to sleep when you hit the snooze button)