EWIN(R) Neoprene Glasses Sunglasses Spectacle Head Safety Strap Cord Holder For Kids Child Children 28x2cm 2 Colors 2pcs (Black);

This retainer is made from neoprene and is a comfortable strap to keep your child's glasses safe & secure.
It is simple to use and will fit most styles of children's glasses (with the exception of the round wire arms) when in use
it sits on the back of your child's head for added security when wearing their glasses.