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