I have masks from at least a half dozen makers, and this one is the best constructed of the lot. It's cool and lightweight, and since it doesn't touch my mouth I sometimes forget I have it on. Definitely worth every penny.
If I could improve on it in any way, I'd put a longer wire across the top of the mask, running the full width of the face. The ends stop just under my pupils, and it can take a little fiddling to get maximum contact with no gaps. A slightly stiffer wire would also be a bonus,...