This is not a complete mask-just a strap. Color: gray (or a little color difference, does not affect the use).
CPAP Headgear Mask Strap for Resmed & Respironics Headgear Strap Universal UK
CPAP Headgear Mask Strap for Resmed & Respironics Headgear Strap Univer
Full Face CPAP Headgear Strap Elastic CPAP Mask Nasal Pillow Strap for Resmed