Slumber Solutions HighLoft Supreme 3 Inch Memory Foam Mattress Topper - KING Topper is 3 inches thick with a density of 3 pounds Materials: 100-percent polyurethane foam Originally designed for NASA, this space age foam cradles your body, reducing pressure points that cause tossing and turning Improves Circulation - Eliminates Motion Transfer - Disperses Your Weight Evenly Helps rejuvenate tired muscles and eases back pain - Meets all flammability standards