I purchased four of these mask. The first time I put one on it tore. I have written two e-mails to Modern Beyond to ask for a replacement of this mask. I have sent a picture of it where it was tore. To date I have yet to receive a message from them. I am not in the habit of writing reviews, but I felt that I was entitled to a replacement mask or a message from them on how to return the one that was broken for a replacement one.