This LMC ISO Mount was designed specifically for use with the Sanken COS-11 lavalier mic.  It is built with a little more thickness than other mounts, and works great in a necktie knot, or anywhere else you need some extra isolation from fabric or skin.  It is made of a flexible rubber material that is durable and can be used hundreds of times.  Available in black and white. There is also a WS version to accomodate a windscreen.