The Comfort Plus Insulated Air Sleeping Mat earned a 2015 Backpacker Editors' Choice award for its innovative Air Sprung Cell technology and dual layer comfort. With two separate layers of interlocking air chambers and our multi-function valve, you can fine-tune the top layer to perfection as well as adjust the base layer to accommodate for rough terrain. So, if one side of the pad punctures, the other remains functional until a repair is made. It's also insulated with Thermolite and Exkin Platinum for great warmth.