Compared to cheaper masks, this really fits my face well and I don't detect any leaking around the edges. The cool flow valve really cuts down on the effort to breath and seems to keep the moisture under control. Strap system seems weird at first, but works quite well. I am wearing this under a ESAB Sentinel welding hood and although is is snug inside, I can lower the hood all the way and breath just fine. Doesn't block my vision at all. The nose piece does pushup my glasses a bit, but workable. A very worthwhile investment in my health. Highly recommended.