Sheeting to cover silage piles and grain piles. Helps to protect the quality of the silage or grain from the weather and critters. Also helps to reduce oxygen penetration into the pile while the fermentation process is taking place. White on outside to reduce heat. Black on the underside to prevent sunlight transmission. 5 mil thickness. Resistant to tears and punctures. Free-fall folded one piece cover. Measurements listed are X ft wide by X ft long. For example, a 32 X 100 is 32' wide by 100' long cover.