The blue silver solar cover is made of two layers of high density polyethylene film: The electric blue top surface absorbs suns rays into the water, then the aluminized bottom “bubble surface” reflects much of the heat normally lost back into the water. This results in quicker heat-ups and greater heat retention.
Please note the solar blanket come in standard 7×11 feet and the user will need scissors to cut it down to 7×10 feet to fit the iPools or 7×7 feet to fit the Fitmax Therapy Pool