If you guys are looking for a nice Respirator check out the parcel safety St100x respirator this is a really nice Lightweight option to throw in your bag Or keep it home and it has impact Resistant glass anti-fog it fits Surprisingly well it's very comfortable And it has a nice high-tech diaphragm to Assist in communication so you don't Just sound like Darth Vader it also is Threaded with a 40 millimeter industry Standard threading for standard Cartridges and it can also be fitted With a NBC 40 millimeter nuclear Biological chemical filter as I said Before this is a very comfortable mask It's super easy to put on and using its Five point harness you can quickly and Easily tighten the mask to kind of float Above your face which I find very Comfortable so if you'd like yours go to Parcelsafety.com and get one today Foreign