Did not work with my fabric masks.
These seem like they'll only work if they're attached to sharply creased folds in a mask, which my fabric masks will never be. Maybe they're meant for throwaway masks and if that's the case I'm sure they'd be great. I can "hook" them onto the mask folds using the little plastic clips but the minute I touch the mask to put it on, the mouth covering comes off. The only way I can use these is with safety pins. There's no way the clips will stay hooked on to the folds.
Rating: 1 stars