
I've used this several times while having a hard workout. Even when it felt like I couldn't suck in any air, it lasted for a few seconds when I just kept breathing. Unlike some of the masks out there that feel like you're going to suffocate unless you take it off.I also used this to clean the barn. I read a review that they thought there was no way it would keep out the dust. I'm here to dispel that as I had no issues after the job was done.I highly recommend this if you're exercising or using it for dust and pollen reasons.Will it keep out a virus? No mask will. But at least when you have to wear it, this makes it a lot easier to breathe.

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