An air mattress is an inflatable bed made from durable materials like PVC or rubber. It can be easily inflated and deflated, making it a convenient option for temporary sleeping arrangements, camping, or guests. Air mattresses come in various sizes, including twin, full, queen, and king, and often feature built-in pumps for quick setup. These mattresses provide a comfortable sleeping surface by allowing users to adjust the firmness to their preference. While they are portable and lightweight, air mattresses may not offer the same level of support as traditional mattresses. Proper care and maintenance can extend their lifespan and usability.