Tekton By Michigan Industrial Tools 6315 10' x 12' Silver Tarp. .Two-layer laminated polyethylene construction . Water, rot, and mildew resistant . Crack-resistant to -20 F . Standard duty 8 x 10 weave (per sq. in.) . Braided poly rope reinforcing all around hem edge . Rust-proof aluminum grommets at each corner and every 36" around hem . UV Shield coating resists damaging ultraviolet rays for longer life.