useless
If you plan on using anything except for a surgical mask. . . don't even waste your time with these. Even on a surgical mask they barely stay on. Any string fatter than the thing kind wont fit in this device and the piece doesnt exactly "clip" on in any real way to keep it on the string. very flimsy. the few times i got it to work and used it out side. . . it didnt ease the ear pain much.
Rating: 1 stars