These unique, Swiss-made mats are manufactured from closed-cell foam that feels soft and warm to the touch. Each single cell is filled with air and works as an air cushion. They are thin but absorb as much pressure as open-cell mats of many times the thickness, without bottoming out or sacrificing any comfort. The Airex mats are extremely durable under normal use. They are light and easily portable. They lay flat and do not slide while in use. Their length allows for total body extension. Their self-skinned surface wipes clean with soap and water. They are impervious to dirt, moisture, and odors.