Tekton By Michigan Industrial Tools 6382 20' x 30' Double Duty Tarp - Silver/Black. .Two-layer laminated polyethylene construction . Water, rot, and mildew resistant . Crack-resistant to -20 F . Double duty 14 x 14 weave (per sq. in.) . Braided poly rope reinforcing all around hem edge . Riveted poly anchor at each corner and rust-proof grommets every 18" around hem . UV Shield coating resists damaging ultraviolet rays for longer life.