I’ve tried them all. This, and also Dr. Puri—which is fairly similar to BOTN—are both, by far, the best. It's proven the the KF94 mask gives the most protection and iBOTN's lightweight 3D design makes breathing a breeze and its built-in nose-clip adjustment helps prevent my glasses from fogging up. I wear white on warm days and black on cooler days. They also look much cooler than most of the other masks I've tried. I highly recommend.