These anti fog foam strips have a self-adhesive backing strip, they are easy to attach to virtually any mask. The adhesive will stick strongly to cotton, polyester, polypropylene, silk, rayon, etc. and most plastics.
A more comfortable fit for your mask.
A closer fit for a better seal around the nose.
and help to reduce fogging of glasses.
Apply firm pressure from both sides for 10 seconds to ensure the adhesive contacts the fabric fully.
Once attached properly the strip will stay in place through multiple washes.