Heavy Duty, Industrial Strength Silver Tarps - Industrial Strength Premium Quality - Heavy Duty Poly Tarpaulin - Lighter and stronger than canvas - Washable and Reusable - Water, Mildew, and Tear Resistant - Rope reinforced corners and sealed-in hems - Rust-proof Aluminum Grommets every 18 inches - Double reinforced corners for greater strength - Tighter weave pattern for maximum weather protection