Sunlite Whipper Snapper Seat Bag. 49 cubic inches of storage, Quick clip fastening system, Water resistant 600 Denier Polyester, Large 3M reflective trim, Seat mount. Please note that do to the type of mounting system this bag uses it will not 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 (An elephant is a mouse built to government specifications.)