The Thermarest Evolite, creates not only a comfortable nights sleep but also self inflating convinience, the perfect camping and outdoor mattress. Air mattress fans rave about ultralight compactness, while self-inflating mattress fans hold fast to stable comfort and convenience. Well, what if you could have both? Enter the EvoLite mattress. Its patent-pending AirFrame construction combines the ultralight, high-loft comfort and compactness of an air mattress, with the convenience and stabilized comfort and support of self-inflation, creating the best of both worlds in camp comfort innovation. 2-inches (5 cm) of loft deliver bump-swallowing comfort while the foam beams add stability, support and excellent self-inflation performance, leaving just a few breaths to top it to your desired firmness. And of course, its ultralight and compact enough to keep you moving easily through the backcountry. Stuff sack included.