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 + Blue Material: Polyester Package Contents: 2 x CPAP Head Straps Note: The actual product color may vary slightly due to lighting and screen display differences. Measurement may vary by up to 1-3 cm.