The Pure Form Memory Foam Mattress uses “open cell” memory foam, which contains billions of balloon-like cells and millions of air passages around them, allowing air to escape. This gives greater air flow, relieves pressure, and promotes the dissipation of heat, keeping you cool and comfortable at night. Because of the way the open memory cell mattress works, you are better supported and more comfortable than with a traditional or “closed cell” memory foam mattress. The process of creating the Pure Form memory foam is also certified as eco-friendly. It is manufactured in a sealed, pressurized chamber, and uses that pressure, not chemicals to form the foam’s properties. This method produces a higher quality foam, and harmful VOC vapors are contained, not released into the atmosphere.