Soft, durable, high-density foam. Non-skid laminate - Heat bonded, (not adhesive) Blocks fit virtually all racks. Easy loading of kayaks and canoes. Kit includes: 4 - 7" extra tall non-skid blocks. 1 - 15' heavy-duty utility strap. 2 - 18' bow & stern tie-down straps. 4 bumper hooks.
