This headgear is designed for use with Respironics Wisp CPAP & BiPAP. Three sizes: standard, large & reduced.
Large headgear is available as an optional item for patients with larger heads; and Reduced Size headgear is available as an optional item for children or adults with smaller heads. Any headgear size can be used with any Wisp. Headgear clips are NOT included with this package.
If your hat size is 7.25 or smaller or your shirt collar size 17 inches or smaller you will most likely prefer the Standard or Reduced Size Wisp Headgear. If your hat size is greater than 7.25 or your shirt collar size is greater than 17 inches then you will most likely prefer the Large Wisp Headgear.