Keeping you Ready for the Road Ahead , the Shur-Co 7' 6" x 18' Heavy Duty Vinyl Tarp has reinforced stitching at stress points, minimizing the likelihood of tears. Proving strong under the toughest conditions, this nonporous material will not shrink, rot, or mildew. This heavy duty tarp made from waterproof material is designed to exceed extensive performance criteria, properly securing your load. FleetPride is your First Click in Heavy Duty .