This is the electric heated mask developed by dry eye professionals that earned The Best rating from The Hammacher Schlemmer Institute because of its superior thermal capabilities. Unlike other tested masks that lacked any heat settings at all, this one has four settings that consistently heated to higher temperatures (106.37° F on low, 128.77 F on medium, 138.32 F on medium-high, and 145.63 on high) than any other tested mask. Recommended by ophthalmologists, the temperature ranges achieved by the mask help relieve dry eyes, MGD, and blepharitis by releasing congealed oils that can build up and clog tear ducts thanks to a special thermal fabric that evenly disburses heat along the Meibomian glands. It also was the easiest mask to use in tests, thanks to its adjustable head strap and 7 1/2'-long power cord (AC- and USB-compatible). With a 12-interval shut-off timer with a maximum of 30 minutes. Recommended for two 10-minute treatments per day. Wipes clean with a damp cloth. Includes two snap-on mask covers.