Our SaddleMattress Vertex design features a unique "hinged" layer of protection so it adjusts to be wider or narrower to fit most sizes of rack - the Velcro straps are used to secure the SaddleMattress so it stays in place when you remove your saddle.

Product dimensions: 23 inches long x 16 inches wide* x 3 inches tall at its center point.  * The Vertex SaddleMattress can be narrower in width since it is hinged for rack adjustability.

If you still have questions please call or text us at 1-617-917-5533 or email lisa@saddlemattress.com.