The DeVilbiss/Sunrise Medical Headgear is intended for the DeVilbiss Serenity Mask. This CPAP headgear is made from a comfortable lightweight nylon construction. The strap and cap styles fit all DeVilbiss nasal CPAP mask sizes.
Chin strap style fits DeVilbiss SM6351D and SM 9351D masks
Comes in 3 models: strap style, cap style, and chin strap