The regular size Sea to Summit Comfort Plus Insulated Sleeping Mat is not only a comfortable sleeping mat, but one that will keep you warm, even on the coldest of nights. It does this by combining a two layer, independent, high-resolution cell layer design with Exkin® Platinum fabric and Thermolite® insulation.The two independent layers can be individually adjusted allowing you to tailor the top layer to be soft while maintaining a firm and sturdy base on uneven terrain. The Exkin® Platinum fabric reflects radiant heat loss back to you while the Thermolite® insulation prevents convective heat loss between you and the ground. This technology enables you to stay warm by helping to capture your body heat and saving you from having to carry larger blankets and sleeping bags. 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.