12'x20' Heavy Duty Silver/Brown Poly Tarp 100% polyethylene high density woven scrim coated Silver on the outside, brown on the inside. 14 x 14 Weave; 6 oz/sq yard; Grommets approx 18" Apart. 100% Waterproof; Wind Resistant; Rot and Mildew Resistant Rope reinforced hemmed edges for added strength Finished Size is 3-5% or up to 10 inches less after edges are hemmed