Upgraded Sleep Experience: Improve comfort & support for sleep without spending a fortune on a new bed. Renew an old mattress, transform a hard mattress, or enhance a new mattress with this twin xl memory foam mattress topper. A twin xl foam mattress topper will also keep your mattress in better shape for longer. Twin XL: 38 x 80 x 3 inch All-Night Comfort: This high-density memory foam mattress topper twin xl conforms to your body and provides real support for shoulders, back, waist, hips, and legs. It's suitable for all sleeping positions and brings ultimate relaxation. Breathable & Cool: This twin xl bed topper is breathable and has airflow channels to carry excess heat away, helping you have a cool night. It's also infused with cooling gel for an enhanced cooling effect.