All the detail should be in the third photo this is brand new In box

Memory foam mattress extra long twin new in box

Base layer of 4.5-inch of heavy-duty foam creates a durable and supportive foundation for the top layer of 1.5-inches of breathable open-cell memory foam
Conforms to your body's contours whether you are on your side, back or stomach
Open-cell memory foam with heat dissipation layer that sweeps heat away allowing for a cooler and more comfortable sleep
Twin XL mattress measures 80-by-39 inches
Four-year Soft-Tex manufacturer's warranty