Masks are difficult to photograph. Often times, the studio uses a white background. The silicone seal is already fairly white, so you get an incomplete idea of what some masks are really like.
Here’s a video I created of the ZZZ Full Face CPAP Mask by PMI Probasics. I find it relatively comfortable, though it could use some improvement. I’ll probably do a review of this mask and its design in the near future, along with suggestions about how it could be improved.