The Training Mask 2.0 with F99 filters offers emergency use medical-grade filtration that could be used in a hospital setting if needed. Not only does the mask fit very well and snug to the face, but it offers better protection than any cloth mask, sports mask, or neck gaiter face cover offered by Under Armour, Nike, Shock Doctor, Copper Fit, and a half dozen other manufacturers that offer "SPORTS MASKS FOR ATHLETES". Look, I get it, I'm tired of being stuck at home too and so are my kids. I want to go work out, my son wants his high school sports programs to start so he can get out there and start training with his friends and my daughter is crawling out of her skin waiting for her gymnastics program to start, but when you get down to the brass tax you need protection from Covid19 PERIOD, especially if your in an active setting with others using an inferior mask that are cloth, gaiters, blue 3-layer hospital mask, or another dumb mask of the week. I did my research and kept looking for a good mask to keep me and my family safe during workouts and practice, and I'm tired of seeing junk masks being pushed by company's that don't do anything to keep you safe especially single-layer gaiters and cloth masks. Don't take chances with your health and the health of your family get a mask that REALLY works like the Training Mask 2.0 with F99 filters, it replaces the elevation rubber grommets with F99 filters that filter out up to 99.9% of the harmful particles in the air including the COVID19 virus that's 3 microns in size. Training Mask 2.0 with F99 filters is approved for emergency use in a hospital setting by the FDA and it still gives you some air intake resistance training since the filters do restrict your ability to breath normally just like a regular elevation mask. Look if you are going to use a mask while you work out make sure it protects you first. It's easy to know if the mask your using is a piece of sh-t, if you could blow out a lit match or flame that's 6 inches from your face while you are wearing your "sports mask", then that mask is junk and it might as well be a single layer Gaiters or cloth mask, or you could always wear nothing at all and hope your bad breath kills the virus before it kills you. Wearing a mask is about protecting yourself and others, don't be dumb, get a good mask that does the job and protects you, your kids at practice, or anyone who is going to work out or participate in a sport or training with others who don't know any better. As always not everyone feels the need, cares, or is smart enough to know how to protect themselves, but you don't have to be one of them. Get a Training Mask 2.0 with the F99 filters, then you and your kids can train hard, have fun with peace of mind and stay alive. Do it, if not for you for your family...