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 therm a rest evolite mattress its patent pending airframetrade 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