40x60 ft Brown and silver poly tarp forms a strong and durable shelter from sunlight, rain and dust, cooler underneath in the summer; Long lifetime up to 3 years, it features good ability of anti-aging for long-time use [Waterproof and UV Resistant Double-side Used Cover]: 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