Self-inflating pads are portable sleeping pads designed for camping and outdoor activities. They typically consist of an open-cell foam core that expands when unrolled, allowing air to fill the pad automatically. This feature makes them convenient and easy to use, as they require minimal effort to set up. These pads provide insulation and cushioning, enhancing comfort while sleeping on hard or uneven surfaces. Many self-inflating pads are lightweight and compact, making them ideal for backpacking. They often come with a valve system that allows users to adjust firmness by adding or releasing air as needed.