ResMed Chin Strap

The Deluxe Chin strap by Respironics fastens with velcro closure for a secure fit. Designed to fit mulitiple head sizes; measurements for the wide strap are 3″ x 26″ and the stability strap is 1″ long and 12″ wide.The chin strap helps prevent your mouth from opening while you sleep, which can help eliminate air leaks that cause nasal or oral drying.