If you're wondering if they work, they do!
Masks are hot.  We all know that.  They are hard to breathe in.  You end up sucking the fabric up in your mouth and can't get it out.  These are simple to use.  I just place it in my mask and put the mask on my face.  It stays put.  It holds the mask away from your mouth and nose.  They do make you sweat under the plastic.  But at least you can breathe easier.  You can easily wash these with soap and water.  I just lay them out to dry.  They fit kids as well.
Rating: 5 stars