This is a 3-Point Chin Strap from Roscoe that's designed to comfortably keep CPAP users' mouths from opening. Keeping the mouth closed at night during CPAP use is critical to ensure continual oxygen therapy and prevent air loss. The 3-point design stretches from the top of the head to the back of the neck and to the chin. The strap is one piece, so there are no stitches or seams to itch or irritate the user. This is a size Large, measuring 27"-29". This Tiara-style chin strap comes in Ruby Red. Ideal for patients who experience their mouth or jaw dropping open during sleep. The 3-point design adds comfort for the user while ensuring continual oxygen. The unique design leaves an open space for the ear while effectively keeping the mouth closed. Made of polyurethane with no latex, neoprene or solvent based adhesives added. Wash by hand with mild laundry detergent and warm water. Let air dry.