Bests & Worsts Reviews from Amazon

This is mask type is a hybrid between the typical bi-fold ear loop masks and behind-the-head respirators.  I like the filtration ratings. I have found that straps that wrap around your head are best for prolonged (all day) use as the ear loop ones cause fatigue very quickly when tight enough to actually produce a real seal.  This has the typical fabric straps.  They are okay.  The first mask I used had a strap break free from the mask.  I was not stretching it abnormally. The size of the mask is good and comfortable on my large head. Your glasses will fog to a great degree however even at regular temperatures.  I was unable to get a good seal no matter how much I tried.  Some of my adjustment worked, but if the temperature was colder, my glasses would have fogged much more.  The nose wire seems fine.  This mask just doesn't work for my application. Overall, fairly typical.  Do not recommend if you wear glasses.  Go with the duck bill kind from this vendor or find a washable silicone mask.