BigXwell Solar Pool Cover, 12Mil 18x36 Foot Rectangle for Above-Ground and In-Ground Pools, 1200Series

A 12 mil solar pool cover with thermal bubbles traps heat from the sun to naturally warm the pool and reduce water evaporation.

• The description claims the cover can reduce water evaporation by 95 percent.
• The description claims the cover can hold temperature on cloudy days or at chilly nights.