Description:  How it works?  Simply snap the garment between the front and back fastener.  Snaps and locks.  Hook face mask ear strap around the snap.  Repeat on the other side.  Works on most hats, caps, scrub caps, bandanas, skull caps, cloth masks, headbands, etc...  Ease and comfort particularly for people who wear masks for a long period of time.  NO MORE RAW EARS!  Easy to clean and sanitize.  This makes an awesome gift for healthcare workers!!  Face mask not included.