Smart, Adjustable Design: These straps are adjustable to suit any head size, ensuring a secure fit with no air leaks. They remain strong and do not loosen easily, optimizing performance for the best treatment experience.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 cleansimply wash under running water, rinse, and air dry. They retain their shape and quality without fraying, curling, shedding, delaminating, or degrading over time.Color: Gray + BlueMaterial: PolyesterPackage Contents: 2 x CPAP Head StrapsNote: The actual product color may vary slightly due to lighting and screen display differences. Measurement may vary by up to 1-3 cm.