Altocraft Multi-Purpose Maximum Durability Poly Blue Tarpaulin---Tent shelter camping (20X24) Stronger than Canvas, yet lighter Washable and Reusable Water, Mildew & Tear Resistant; Tighter Weave Pattern for Maximum Weather Protection Rope-Reinforced Corners & Sealed-in Hems Rustproof Aluminum Grommets every 36inches, 8 X 8, 70Gr/m2