Track IR gives you the option of either a baseball cap with the less than accurate reflective attachment or to headphones with the more accurate IR LED attachment. I don't wear headphones when on the pc and certainly not a baseball cap and all other options on thingiverse involve taking the TrackIR to pieces.

I designed the headband so that the TrackIR can be used with the headphone attachment exactly as it is out of the box.
Also included is a hook to hang it on, use double sticky tape to stick it anywhere you like.