Therm-a-Rest have always strived to offer the best in camping luxury. Using a patended self-inflating system that is very simple and therefore effective and reliable, you just open the valve, allow the mat to inflate, close the valve and that's it! The air is trapped inside the core and pressurised by your bodyweight supporting you without the normal air displacement common to most inflatable mattresses, thereby reducing the experience of additional pressure on your hip or shoulder. Redesigned and organised into three easy to understand categories there is a model in the range to suit every outdoor enthusiast in any situation.