There is NOTHING better on the market.
I couldn't disagree more with the negative reviews. It is easy to put on-you just slide the mash through the holes in the mask liner and adjust with Velcro closure. The size is correct, and also is adjustable if you prefer it tighter. I have tried so many liners over the last 15 years and nothing beats this one. It is the most comfortable, easiest to use, and works best for comfort, preventing irritation and preventing leaks. Do not hesitate to buy. I'm here today buying my 6th liner. You only need one at a time but I suggest two so you can put your new one on while washing the other. Definitely go for it. The customer service is top notch, you're supporting an innovative and helpful small business, and you're doing yourself a favor making CPAP more tolerable!