Specifications:  Three-Layer Construction of Specially Reinforced, Laminated, High-Density Polyethylene Fabric  Water, Rot, and Mildew-Resistant  Crack-Resistant to -20Ý Fahrenheit  Rustproof Grommets on Each Corner and all Around hem  Poly Roping Sewn into Hem all Around for Extra Strength  Tough with Reinforced corners, All-Purpose Utility Covers  Regular Grade Tarps 8 x 10 Weave, Aluminum Grommets every 36'' Around Hem and at Every Corner Contents:  18' X 24' Regular Grade Blue Tarp