With 4 points, the head strap allows quick customization for optimal tightness, reducing discomfort and improving user satisfaction by approximately 25 Made from medical grade flexible nylon, strap ensures long wearing comfort with excellent breathability and properties to skin irritation Offering durability and reduced risk compared to standard straps Perfect for nightly at home or in hospitals, this replacement headgear improves sleep for respiratory patients This headgear features advanced clips for easy nighttime adjustments and secure fit, specifically designed for F40 full to enhancing sealing and reduce air leaks