Our spa covers have been manufactured for over 35 years. Our aluminum safety spa covers are the longest lasting covers on the market. Made to withstand the harshest elements and made to keep children and pets safe. Our aluminum spa covers are completely sealed, inside and out so they won't absorb water. No more soggy, heavy vinyl spa covers. The cover is made from aluminum and foam. The cover is a full 2 thick for added insulating value and is protected by our limited warranty. The top and bottom surfaces are aluminum with a baked on enamel painted finish.