When it comes to pioneering innovation and superior structural integrity, it is what you don’t see that counts! Radiant Pools are engineered from technology originally developed for the NASA Space Program. Our 2-inch thick insulated wall panels are constructed of a closed-cell expanded polystyrene (EPS) foam core bonded between 2 sheets of durable acrylic-coated aluminum. All polystyrene used is treated with environmentally safe insecticides to prevent any insect infestation, guaranteed. Tested and proven for over 60 years.