[MATERIAL AND SIZE]: Made of 100% virgin poly materials. Thickness:5.5Mil [STRONG AND DURABLE]: It has strong tensile properties, so that difficult to tear in daily use [LIGHT-TIGHT]: Provide 100% light proof and waterproof because of the special material [BLACK SURFACE PERFORMANCE]: Absorption of light to achieve the function of isolating light [WHITE SURFACE PERFORMANCE]: Pasted on the floor or wall, it can reflect more than 90% of the light, and gather the light indoors for the rapid growth of plants