This ruby-style chin strap is a simple and comfortable solution for those who don't want to use a complicated chin strap for their CPAP or BiPAP mask. It is made of a breathable material with adjustable straps located at both the crown of the head and at the base of the neck and are made with hook and loop material. It also aids in keeping your mouth closed during CPAP or BiPAP therapy and may prevent the patient from having to wear a full face CPAP mask. Compare to PureSom Fusion CPAP chinstrap TMS-09L.