Silver Heavy Duty PE Tarps are manufactured from tough woven polyethylene which is made from a tight weave 14x14 per sq. in., providing extra durability and longer life. This 6 oz. tarp is water resistant and tear resistant providing the extra strength required for many outdoor functions and activities. Use during the hot summer months with its high UV protection and sunblocker qualities or during the fall to rake and remove leaves, Winter & Spring where the black side can assist in snow melt.