Replacement Headgear for the SleepWeaver 3D Mask The headgear for the SleepWeaver 3D CPAP Mask is a replacement item. SleepWeaver 3D's unique wing-shaped headgear has soft straps with rounded edges that fit just above and below the ears. 3D headgear is easy to fit and simple to adjust. It is available in regular and large sizes. Special Features Compatible - The headgear is compatible with the SleepWeaver 3D only. This headgear is not compatible with any other masks, including other SleepWeaver masks Sizing - Headgear sizing is based off of neck size. Measure around your neck to determine the size needed. The regular size headgear accommodates neck sizes up to 16.5" , the large size accommodates neck sizes 16" or greater Cleaning - Wash headgear once weekly with warm water and mild soap. Air Dry, out of direct sunlight Included with This Package (1) SleepWeaver 3D Nasal Mask Headgear (in selected size) Optional Accessories CPAP Bedside Table Universal CPAP Hose Tubing CPAP Mask Cleaning Wipes Recommended Replacement Schedule Cushion: Every 1-3 Months (or as needed) Headgear: Every 3-6 Months (or as needed) Complete Mask: Every 9-12 Months (or as needed) Tube Hose: Every 1-3 Months (or as needed)