The Diadem Extreme Mat is a warm, packable and comfortable thermal sleeping mat designed for 4-season use and a good night's sleep on cold ground. This inflatable insulation mattress has a high quality 2-way valve for easy inflation and quick deflation. The hardwearing, durable main material is made from a robust 30 denier ripstop construction. It also has an inner layer with heat-reflective technology that reflects the heat emitted by the body for greater warmth. And the underside is covered with non-slip material to prevent slipping during the night, so you can sleep and rest more comfortably without the cold ground stealing your body heat.