The SLEEPINC. 8-inch and 10-Inch Memory Foam Bed in a Box Mattress is designed for quality and comfort for your best night’s sleep. Ideal for side and back sleepers, the fully supportive design reduces motion transfer while relieving stress on pressure points, providing a comfort level only memory foam can provide. A layer of Cooling Gel Visco Memory Foam delivers all of the pressure-relieving properties of memory foam with cooling gel infusion for a cooler sleep surface, letting you wake up refreshed. The CertiPUR-US certified polyurethane foam is made without harmful chemicals or heavy metals, and contains low VOCs and no formaldehyde. The SLEEPINC. 8-inch and 10-inch Memory Foam mattresses are compatible with an adjustable base frame (sold separately). A comfortable stretch-knit cover to protect it from stains. Available in 8-inch and 10-inch profiles, SLEEPINC. memory foam mattresses come in Twin, Twin XL, Full, Queen and King to complement any body size or type. Note: Your mattress may take a little time (24-48 hours) to grow to its optimum size after coming out of the box. Benefits of waiting a full 24-48 hours include expansion & ventilation. Sleeping on the mattress before the 48 hours will not impact the quality or comfort of your new mattress. 8-inch Mattress Approx. Dimensions; Twin - 74L x 37W x 7.75H in., TXL - 79L x 37W x 7.75H in., Full - 74L x 54W x 7.75H in., Queen- 79L x 59W x 7.75H in., King - 79L x 75W x 7.75H in. 10-inch Mattress Approx. Dimensions; Twin - 74L x 37W x 9.75H in., TXL - 79L x 37W x 9.75H in., Full - 74L x 54W x 9.75H in., Queen- 79L x 59W x 9.75H in., King - 79L x 75W x 9.75H in., sizes may vary slightly after expansion.