In 1988, University of Wisconsin researchers studied the device, called a Lungplus, when used by 91 subjects in various cold-weather conditions. Over all, Lungplus users reported more comfort breathing in very cold temperatures. The researchers noted that Lungplus breathing at minus 15 degrees Celsius received similar scores, in terms of comfort, as regular breathing in 20 degrees Celsius, according to the research published in Applied Ergonomics.
Office of Strategic Communication