The film increases the water temperature by up to 8°C. Keeps the heat in the pool much longer. Reduces heating costs by up to 70%. Reduces water evaporation by up to 90%. Reduces chemical consumption. Suitable for easy and frame basins. Also keeps the swimming pool clean. Note: The solar foil deliberately has small holes in the middle. There is an important reason for this: there must be an exchange between air and water, otherwise there is a risk of the water tipping (turning green). Another important reason is that otherwise the solar foil could sink into the water in the rain. For maximum effect, the air cushions must look down. The solar tarpaulin swimming pool cover lies directly on the water and largely reduces water evaporation and protects its water from contamination.