PSOLAR EX HEAT EXCHANGER FACE MASK Eliminate the danger and discomfort of frigid winter gasps! Polartec fleece face and neck wrap uses exhaled air to warm your next breath, keeping everything from your teeth to your lungs wa rmer and more comfortable in environments as cold as -40F! Ideal for Military, EMS, Law Enforcemen t, outdoor sports and recreation participants, refrigerated work-environment employees, and others.