The CPAP mask strap is made of sturdy, lightweight, breathable soft fiber fabrics for added comfort. Its stretchy and smooth interior surface, along with durable nylon hook straps, helps keep your CPAP mask securely in place. Enjoy a more comfortable sleep with this replacement CPAP headgear. The headband is washable and designed to resist fraying, curling, shedding, delaminating, and other forms of wear. To replace, simply unhook the nylon straps from your old headgear, attach the new one in the same manner, position the back strap over your head, and adjust for a secure fit compatible with F30 full face CPAP masks. Color: Gray Material: Lycra + sponge + raised cloth Package Contents: 3 x CPAP headgear straps 6 x Clips Note: Only the items listed are included. Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.