40 x 40 Silver/White Tarps are made in the USA. 14 x 14 mesh count, 12 Mil, 7 Oz. poly with brass grommets spaced every 24 apart. Each 40 x 40 Silver/White tarp is fabricated with rope lined seams and is 100% UV resistant, water proof and rot proof. The triple layer, rip-stop poly material is ideal for any outdoor application and designed for extra-long durability.