This sofa uses high-density memory foam that perfectly conforms to your body's contours. 15" backrest provide extra support and lumbar comfort, and the sofa immediately returns to its original shape after use. The boneless sofa is designed as a single piece, with the bottom resting directly on the floor, enhancing stability and durability. Whether you're watching TV, reading a book, or chatting with family, the floor sofa will provide you with the ultimate in comfort. Dimensions: Note: The sofa is compressed and vacuum-sealed for convenient transportation. After opening the package, please let it breathe for 72 hours to return to its original shape and size.