Material: It consists Silver-plated layer, waterproof layer,210D. We have upgrade the pool cover now,Our pool cover have small holes in the edges so you can attach the cover with the rope we provided. MINIMIZE WATER EVAPORATION - The use of a solar cover helps in preventing up to 95% of pool water evaporation. When not enjoying a refreshing swim, keeping your pool covered lessens the vast amount of water lost into the environment. Keep Clean - Prevent leaves and dirt from entering the pool, reducing maintenance time, it is also very suitable as a heat cover for a heated swimming pool, easy to use and economical, reusable and easy to store.This above-ground pool cover keeps your pool free from dirt, insects and debris when not in use Keep Warm - In addition to covering your swimming pool, this solar cover also uses the natural energy of the sun to warm the water. So you can extend the bathing season by preheating the water and keep a pleasant temperature later in the season. Resusable Our pool cover is waterproof and never be damaged by soaking in water or sunshine, Made by high-quality harmless materials.Reusable and easy to store. Colour:Blue Material:PE+aluminum Size:covering cloth:18FT; wire rope:20m Package Contents: 1 * covering cloth 1 * rope tightener 1 * wire rope Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.