Airex Fitline 140 Exercise Mat The air-filled cells act as cushions to prevent "bottoming out" under the most rigorous exercises. The mat insulates the body from cold surfaces and reflects body heat, helping to maintain body temperature. The AR-140 mat will float on water! The water blue mat is 56" long, 23" wide and .4" thick. Dimensions 9.5" wide, 26.5" long, 9.5" deep & weighs 5.1lbs.