The 10-pack of white ISO-MT-WSWHT10 Short ISO Mount for Sanken COS-11 by LMC Sound is for mounting microphones. It is used in various environments for audio applications such as broadcast TV, film, theater, videographers, reporters, and more. It can be used as a necktie knot mount or wherever you need extra isolation from fabric or skin. The mic is held in place by tension on the mic shaft. Made of flexible rubber material and can be used multiple times.