The Summer fun Solar Cover not only protects your pool from gross contaminants, which is beneficial to the use of chemicals, but because of its "bubble wrap" structure, it reduces evaporation, keeping the water at temperature for longer periods of time. The blue cover floats on the water and should always be slightly smaller than the size of the pool in order to discharge excess water. Features: Retains heat Floats on the water Pool water is less likely to get dirty Specifications: Color: blue Gender: unisex Material: plastic, PVC Dimensions: 347 x 347 x 0.023 cm (L x W x H) Weight: 6.2 kg Thickness: 230 microns