The Ultra Chinstrap by CareFusion is comprised of a single length of material. The single strap which goes over the top of the head is 1 inch wide and closes at the top using a Velcro tab. The tab can be attached anywhere on the strap allowing for greater adjustment options. At the chin the strap widens to 2 1/2 inches, the chin cup is the same material as the straps. When the mouth drops open during sleep a full face mask is needed to ensure the therapy pressure is not escaping through the mouth. Adding a chinstrap to the therapy to stop the jaw from dropping may allow for the use of a nasal mask or nasal pillow system. Manufacturer Notes on the Ultra Chinstrap: -Put the chinstrap on prior to putting on the mask and headgear. -With the mouth closed, place the chin in the cup and pull the straps up to the top of the head and fasten. -With the Ultra Chinstrap in place, put on the mask and headgear. -To avoid discomfort, avoid over tightening. Care and Cleaning: Wash the Ultra Chinstrap weekly using a mild detergent, allow to air dry. The Ultra Chinstrap should NOT be machine washed or dried, or put in the dishwasher. Do not iron the Ultra Chinstrap. Includes: One Chinstrap Materials Content: Breathe-O Prene (Nylon / Spandex / Polyurethane)