The Sea to Summit Comfort Plus Sleeping Mat in regular size features two independently adjustable layers that allow you to manipulate the amount of air in the sleeping mat. This means you can tailor it to your personal firmness preferences.The two independent high-resolution layers can be individually pressurised, allowing you to adjust the top layer while maintaining a firm base. With this innovative design you don’t have to put up with uncomfortable nights sleeping on mats that are too firm or terrain that is too rough. The Sea to Summit Comfort Plus Sleeping Mat’s two layer design means that body weight is more evenly distributed over more cells. This combined with the fine tune valve ensure that you’ll wake up feeling refreshed without the soreness normally associated with camping. All Sea to Summit sleeping mats come with a repair kit and spare silicone one-way valve flap that can be conveniently stored in the high quality stuff sack.