Experience total comfort with our luxurious NeutraBliss Collection. Our sensory foamÂ® cool onyx and sensory foamÂ® gel combine cutting edge heat dissipations with unparalleled pressure point relief to keep you comfortable all night long. Highlights: 13-inch thick mattress Firmness Rating: Firm Cooling sensory foam Cool Onyx and Gel which accelerate heat dissipation and sense pressure and adapts itself to your natural curves Supportive foam springs that move independently provide individualized comfort, maximum support and durability and eliminate motion transfer Complete Airflow throughout the mattress provide temperature-neutral sleep and allow air to circulate throughout the spring layers Designed and constructed in the USA 10-Year Limited Manufacturer Warranty Fiberglass Free Spot clean only Carried in Twin XL, Queen, King, Cal King Dimensions: Twin XL: 38 inches wide x 75 inches long x 13 inches thick Queen: 60 inches wide x 80 inches long x 13 inches thick King: 76 inches wide x 80 inches long x 13 inches thick Cal King: 76 inches wide x 80 inches long x 13 inches thick Mattress Tips: Conveniently arrives tightly packed in portable box. Remove from packaging within 72 hours to maximize expansion. You can sleep on it the same night it is unwrapped, however, allow 48 hours to fully return to its original shape. 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 similar products may produce different firmness results. Once opened this product is non-returnable.