The ResMed headgear is designed for ResMed Mirage Range Mask to give you that extra softness and stability that is so important for a good fit. The Quattro Mirage headgear is designed to reach above the ears and over the crown of the head before connecting at the base of the head. With 4 headgear connection points, the 2 upper straps connect at the top of the mask frame, while the lower 2 straps connect to clips on the base of the mask frame. The Quattro FX replacement headgear strap is available blue in color.