Brown poly tarp has built-in UV resistance on both sides.Rust resistant grommets approximately every 3 feet on all sides.Brown tarps have Heat Sealed Seams. Rope Reinforced Hems.Brown poly tarp is water, mildew and rot resistant. Tear and acid Resistant.Economy brown tarps ideal for woodpile tarps, backpack tarps, camping tarps and RV covers, landscaping tarps.