Revolutionary memory foam infused with cool, rejuvenating gel in this large sculpted design provides the ultimate supportive and comfortable sleep experience. Gel absorbs pressure and channels heat away, preventing excessive heat build-up that causes sleep disturbances. Type: Gel memory foam Measures 4 inches thick Density: 3.2 pounds Originally designed for NASA, this space age foam cradles your body, reducing pressure points that cause tossing and turning Temperature sensitive foam adjusts to your body temperature Sculpted design provides improved air flow Includes 300 thread count Egyptian cotton cover with 17-inch skirt Eliminates motion transfer and uncomfortable pressure points Helps rejuvenate tired muscles and eases back pain Meets all flammability standards Dimensions Twin: 37 inches x 73 inches Full: 52 inches x 73 inches Queen: 58 inches x 78 inches King: 75 inches x 78 inches California king: 70 inches x 82 inches Memory Foam Tips: Remove from packaging within 72 hours to maximize expansion. This product arrives very tightly packed. Unwrap and allow 48 hours to return to original shape. Being sealed in plastic packaging sometimes traps odors. After unwrapping, allow product to air for a few hours. There may be slight variances in the dimensions. The firmness level of every item is unique. Please be advised that even similar products may produce different firmness results. Topper dimensions may be slightly smaller than your mattress dimensions. Size has been designed to allow you to easily secure your fitted sheet over your new memory foam topper. Size: California King.