Improve your sleep and awaken feeling completely refreshed with this Curv open air memory foam mattress topper by Simmons. It features an improved cell structure, designed to maintain its original shape and feel for the life of the product.Features:Originally designed for NASA, this foam cradles your body, reducing pressure points that cause tossing and turningEliminates motion transfer, helping you to remain undisturbed throughout the nightHelps rejuvenate tired muscles and eases back pain, providing you with a good night's sleepDisperses your weight evenly to help you get comfortable and stay comfortableDetails:Materials: PolyeurethaneColor: Off-whiteMeasures 3 inches thickDensity: 3 poundsMeets all flammability standardsDimensions:Twin: 38 inches wide x 74 inches longFull: 53 inches wide x 74 inches longQueen: 59 inches wide x 79 inches longKing: 75 inches wide x 79 inches longCal King: 71 inches wide x 83 inches longMemory Foam Tips:Remove from packaging within 72 hours of receipt to maximize memory foam expansion.This product arrives very tightly packed. Unwrap and allow 48 hours for this product to return to its original shape.Being sealed in plastic packaging sometimes traps odors. After unwrapping, allow product to air for a few hours.Due to machine-cutting manufacturing processes, there may be slight variances in the dimensions of this product.Due to the nature of Memory Foam the firmness level of every item is unique. Please be advised that even similar products may produce different firmness results.Once opened this product is not returnableClick here to view mattress topper buying guide.