This twin size mattress is medium-firm, allowing it to contour seamlessly to your body while reducing pressure points, making it an excellent choice for any twin size bed. The twin mattress memory foam construction includes three hypoallergenic layers: a cooling gel foam top layer to maintain an optimal sleeping temperature, a breathable middle layer with airflow channels, and a supportive firm base For set up, simply remove the vacuum-packed twin size mattress from the packaging and allow up to 72 hours for it to fully expand. Crafted with care in the USA with both domestic and imported parts, it is ideal for any bedroom or guest room. From the Manufacturer Amazon Basics