The chains hook on to each side of your mask straps so when you are not wearing your mask it can hang around your neck like a necklace, and even invisibly if you turn it around. I handmake them with deadstock vintage chain, vintage findings, beading, and some new materials for custom designs and/or to replicate a vintage look.
My kids line has been very popular too, not only because they are cute, but also because kids are WAY less likely to lose their masks. The chains I make for kids vary with either beading, chain, or silk cord decorated with cool and colorful charms. My kids are a little more into wearing masks than they were before,which for me has been a game changer.