Smart, Adjustable Design: These straps are adjustable to suit any head size, ensuring a secure fit with no air leaks and maintaining strength without loosening easily. Optimize your therapy experience with this well-designed accessory. Superior Comfort: Made from high-quality, stretchy, skin-friendly fabric, these straps offer exceptional comfort. Their soft texture eliminates irritation, making them ideal for sleep and comfortable to wear in any sleeping position. Perfect Replacement for F20: Specifically designed for F20 masks, these straps provide a snug and reliable fit throughout the night, serving as an excellent replacement for original head straps. Premium Quality and Durability: The replacement headbands are easy to clean—simply rinse under running water and air dry. They retain their integrity without fraying, curling, shedding, delaminating, or degrading over time. Color: Gray + Blue Material: Polyester Package Contents: 2 x CPAP Head Straps (Only the listed items are included; other products are not part of the package) Note: Lighting and display differences may cause slight variations in color. Measurement may vary by +/- 1-3 cm.