Sleep Creations 2" Aerus NaturalTM Cooler Sleep, Memory Foam Mattress Topper with Ribbed Knit Terry Velour Cover - King Size Memory Foam made with renewable, natural ingredients Premium Rib Knit Terry Velour Cover 3 Pound Density Memory Foam Includes natural-based ingredients Manufactured using a patented and VPFSM process that produces virtually zero emissions during the production process.