I have several blind folds and this is the best one I’ve found. It is made of fairly light weight material with a fur lining and two elastic straps that secure in the back. Each of these things are very important.
The light weight material allows the mask to breath for lack of better word so your partner’s face does not become hot or sweaty under the mask. It also allows the mask to bend. A lot of masks are too rigid and look good in pictures but do not bend well to people’s faces. And thirdly this is important as heavy material tends to weigh on people’s eyes which is very painful.
The fur feels comfortable against their face and if the mask slides around it will not irritate or scratch their skin. it also adds a cushiony feel to the mask which helps for extended sessions.
The two elastic straps are critical. I don’t know how many masks get this wrong. It allows you to secure the mask so much better with one going over the ear and the other strap under it. It insures that the mask does not accidentally get knocked off or shoved around when lightly tapped.
If there is a better blindfold than this one, I have yet to find it.