3. The mattress surface is very uneven due to the multiple sunken “coils”. We tried a memory foam mattress topper we had in the closet, but it only helped a bit. 4. The mattress does not have a velvet coating on top like most air mattresses. This causes it to slide around inside the cloth liner it slips into on the top of the frame.
https://www.amazon.com/Coleman-Camping-Mattress-Folding-Operated/dp/B07RX9131R