The "Silencer" (also known as rubber thingys, ID gaskets, and rubber doo dads) fit snugly around the edge of the FIXX ID. They were originally developed for military men and women to keep their dog tags from clanging together. If you wear the FIXX ID with other necklaces, the silencer will help keep things quiet if they bounce against each other. They are also a perfect accessory for those athletes that want to add a bit of pizzazz to their FIXX ID. Available in Black, Clear, Blue, Green, Orange, Red, and Yellow.