Comfy materials: this set of 4 pads prevent discomfort caused by CPAP straps and give you better sleep .it's and comfy pads for your CPAP and no more friction rubs from moving around at night .Help you getting a full night of sleep and stop worrying about the red marks ,Washable: CPAP mask cover is machine washable. and durable even with repeated wash and use . this CPAP face mask cushion was made of durable and soft fabric .Adjustable: The standard length of this CPAP mask pads is 5.5" inch but you can cut and adjust the length if required, and install it easily with build in hook-and-loop fastener .This mask strap cover will keep your headgear from getting too dirty and having to replace it a lot