Size: - Large. 2-PACK Replacement Headgear Straps and 4 Clips, No other parts of the mask are included. Replacement headgear for ResMed AirFit F20 or AirTouch F20 full face CPAP mask. WASHABLE - This durable headgear can be washed repeatedly without fraying, curling, shedding, or other forms of degradation. long service life. COMFORTABLE - The CPAP headgear straps 100% use of the most advanced medical grade fiber, lightweight and thin. the outer layer is flat and smooth, the interior furry design is soft and comfortable. THEY ARE NOT ALL THE SAME! - Sturdier quality material & stronger tips hold your mask in place for a perfect fit with optimal comfort thanks to smooth interior surface --> more restful night Airfit f20 Headgear with Clips, Replacement CPAP Mask Headgear Strap with Clips CPAP Supplies for Airfit/AirTouch F20, Large (Without Mask)