Weatherproof tire covers feature tough exterior and interior, standing up to whatever Mother Nature dishes out. Features: Weatherproof PVC vinyl exterior, woven lined interior with elastic cord and slit in gusset for flexibility. To find the correct size measure the diameter of the tire. Covers are available in the following diameter measurements: 28'', 29'', 30'', 31'', 32'', 33''. Material: Vinyl.