Spa Choice Crystal Blue 2040RS-10SBD Solar Pool Cover 20x40 ft - Heavy Duty UV Resistant Swimming Pool Cover for Inground Pools - Keeps Water Warm, Reduces Evaporation & Saves Energy - Perfect for Backyard, Residential & Commercial Pools

The Extra Heavy-Duty Space Age Solar Cover includes a unique aluminum heat shield that traps otherwise lost heat back into the pool from the special aluminum underside. The extra heavy-duty material works to retain heat.

14.6% greater heat retention

Extends Swimming Season

Increases Pool Water Temperature By Up To 10 Degrees Fahrenheit Or More

Cuts Evaporation By Up To 90%

Helps Retain Solar Energy And Keep Heat In Your Pool