I use the full face mask shown in the picture in the Amazon ad.
Unfortunately, due to the design of this pillow, the upper mask clip is wedged between the pillow and the side of the head in use. There is a lot of discomfort and because of the side pressure on the mask, a lot of leaks. I tried it for two nights and gave up because I couldn't sleep more than a half hour at a time without having to shift position to ease the discomfort or stop a leak.
According to the company's return policy, hygiene law prohibit them accepting returns or giving refunds on pillows.
This product is unusable and I'm out $50.