The cpap mask strap is made of sturdy, lightweight, breathable soft fiber fabrics for extra softness. Its stretchy & smooth interior surface and stronger Nylon Sticker straps will hold your cpap in place. Sleep more comfortably with our cpap supplies headgear. replacement CPAP ventilator headband can be washed repeatedly. And you don't need to worry about its fraying, curling, shedding, delaminating, or other forms of degradation. Unhook the Nylon Sticker straps of your old worn headgear from the cpap mask, put the one on in the same way, position the hole in the back of your head and tighten to keep the f30 full face cpap mask with headgear in place. The actual product may have slight color difference or difference, which will not affect the use Colour:Gray Material:Lycra+sponge+raised cloth Package Contents: 3 x CPAP headgear strap 6 x Clips Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.