UV protection heat protection heat protection thermal film Reduce water evaporation to avoid unnecessary water waste. The cover leaves a small space at the edge of the swimming pool to allow water to breathe in order to stay in the best condition Tower thickening folding pool cover cover the top of the pool to prevent leaves, dust and dirt from collecting in the pool The swimming pool thermal insulation coating film uses the PE air cushion to collect the heat stored in the swimming pool, so that there is only little heat loss during the night The summer dust proof swimming pool cover is waterproof, radiation resistant and will not be damaged by submersion or sunlight. You can continue to use it next summer. The Round Bubble Cover is made of safety material, which can convert ultraviolet light into free heat in the swimming pool and reduce the cost of heating the swimming pool. It can reduce evaporation in the swimming pool, save water and is suitable to water consumption in summer. It can also help you keep the pool clean when you are not using it. Features Round Bubble Cover -White color. -Material: PE. -Size: Diameter: 122cm / 48.03inch / 4ft. Note: Due to the display and lighting difference, the actual color may be slightly different from the picture. Due to manual measurement, please allow 1-3cm in size deviation. Package including 1 * Round Bubble Cover