I ended up buying the GVS Ellipse P100 Half-Mask respirator (M/L) because I couldn't find many negative reviews and seems they are popular with you folks as well. My observations, including using them while grinding tile thin-set off the plywood floor in a small room. If you have ever done this you know you cannot create a more dusty environment.
- The first impression when I took them out of the box, was they had sent me the wrong size, these things are incredibly compact and light.
- The two straps fit great and don't move or twist and they hold the mask where you put it, they are comfortable even with safety glasses and a hat.
- Breath freely, you know you have a mask on but they don't leave you feeling like you need more air.
- Filter very well, I have a full beard and I did get a minor amount of dust leaking from the around the chin area but that was not the masks failure
- Easy to forget you are wearing them, I tried to drink a beer with them on, may have been the three beers I had already had but they are comfortable
- Safety glasses did fog up, oops, my bad I put the mask on upside down, again see beer reference

- Lastly, but certainly important, I emailed customer service with a filter question and they replied within 2-hours
:thumbsup:Very happy with the mask, thanks for the input!