The self-inflating mattress combines the advantages of a foam mattress and an air mattress. It is designed to provide a comfortable place to sleep in nature or when camping. A key feature of the self-inflating mattress is its ability to partially inflate automatically, making it easy to prepare for use. Self-inflating mattresses contain an open foam core that expands and draws in air when the valve of the mattress is opened. This partially inflates the mattress and increases its volume.