Poly Tarp: Strong & Durable Shelter - 20x30ft Silver and Black Poly Tarp forms a strong and durable shelter from sunlight, rain and dust, cooler underneath in the summer Qualified Material - Made of 100% brand-new PE material and triple coated lamination for double-sided use, silver layer for resisting sunlight in sunny day, black layer for maintaining heat in cold day, both side for waterproofing, UV resistance & not easy to get black stains in wet weather