AMAZON PRODUCT WIN -- I'd been dry grinding concrete and perhaps you can imagine what kind of horrible dust that creates. Earlier in my project I had dry sawed and jack-hammered concrete for which I used a traditional dust mask and safety glasses and it sucked. The mask didn't keep me from taking in that 'bad for you' silica dust and the safety glasses kept fogging and/or got sweat beads on it. At a local hardware store I found a full-faced mask. It retailed for mid-300's. Nope. Found this full-facer on Amazon for $40. (I see it for $22 today as a black friday deal!) I hadn't been this impressed with a product in a while. It presented as high quality, the straps are ridiculously easy to cinch and loosen and they hold well, it's not annoying to wear and most importantly, I had been sweating for an hour and a half and it was not an issue. No fogging. The good seal just above my brow acted like a sweatband, keeping most of the sweat out. The inner mouth and nose piece sealed good and breathing was easy. My body was covered in thick layer of dust, but my respiratory tract was all clean. No picking cement boogers the following day! I slept well on the satisfaction that something far exceeded my expectations. I am sure to use this for other uses going forward.