A solar cover is a great way to capture the sun's heat and take full advantage of this natural resource to heat your swimming pool. Maximise your time enjoying your pool instead of cleaning it, by keeping leaf litter and bugs out and reducing the chances of your filter clogging with this 400-micron pool cover. Reduce Evaporation By Over 97% Genuine 400 micron technology means your pool cover will last longer than the thinner ones on the market. Plus it will provide greater heat retention and will be more effective in reducing water evaporation - by up to 97%!! Save Water Save On Chemicals Reduce your rate of evaporation and you'll also reduce the amount you spend on chemicals for your pool. Win-Win situation! These heavy duty covers are made from the highest quality material LDPE which is salt, chlorine, and sun resistant. Cut to fit: Getting the right fit is as easy as finding a marker and a sharp pair of scissors. Bubble shape may vary. Store in the shade when not in use.