Good mask and can make the strings tighter for a tighter fit but if you're doing cardio it'll still get soaked.I could care less about a mask that filters, I want to be able to breathe. I wear this at the gym, it works great and is comfortable. It doesn't get wet from sweat, and the mask doesn't get pulled into my mouth by deep breathing as long as my nose is covered.Purchased for a long flight. Much better than the paper masks.Some gyms such as school gyms mandate mask wearing despite CDC warnings that doing so will lead to adverse health problems. These masks are a great work around as they provide 'policy' compliance as well as helping those who have respiratory deficiencies especially in high intensity exercise.It fits good and works as it said it would.These masks are so much more wearable than any other mask we've tried. They are comfortable and non-restrictive enough that it makes my son (who has school anxiety) able to wear it for the whole school day. This is a big deal for kids like him.Mostly a show mask to show you're wearing one. I work in a warehouse that we have to wear a mask in. I'm moving quite a bit and most masks are hot. So far these help tremendously with that. Probably would be pretty good at the gym too. I don't think they'll protect you or anyone near you.Even MORE breathable for your kids when your cut out the unnecessary second liner!! Unfortunately they still have to wear the first unnecessary liner to school. But this version is tolerable…. For now. One of the better options out there.