About this item 39*80*12 inches，12 Inch Grey，Twin XL ??Balance Support&Pressure Relief. 12 inch twin xl mattress combined the supportive of pocketed springs with the comfort and adaptability of memory foam. Independent pocketed coils provide strong support to every part of your body, suitable for all sleeping positions(No matter if you're a stomach, back, or side sleeper). Memory foam actively contours to your body's curves, aligning the spine and relieving pressure point aches and pains ?️?️Edge Support. Xl twin mattresses are designed with 2 sizes individually wrapped springs,provide more stable support and give you a restful sleep. Thickened springs at both edges improve the edge support of the mattress, providing stability and preventing you from rolling off ✔✔Certified Quality Foam. Hybrid twin xl mattress are made of high-quality knitted fabrics and multiple layers of high-quality foam keep you away from back pain. All memory foams are certified by CertiPUR-US and are inspected to contain no harmful substances, which are suitable for everyone to enjoy ??Twin XL Size Bed Mattress in a Box. The foam and spring hybrid mattress is vacuum packed into a box, which does not take up space and is convenient for transportation.With the side handle, it should be easy to operate and flip the mattress ? ? Warranty. Please unbox the kow colchones twin mattress at lease 72 hours in advance to allow it to fully unfold. NOTE: Once opened, it is difficult to retrieve it back into the box. If there is any problem, please contact us .10-year warranty and 24-hour online customer service