Kittens Toy Room: Adjustable Posture Collar

Okay, from Kitten's Toy Room (who make a variety of reasonable looking leather buckle collars) I found this really rather interesting thing.  An Adjustable Posture Collar.  Yup, thats right, its slightly industrial/medical looking but that works for some people :)  By all accounts it has 4 settings to give a variety of strictness to neck posture, 4" to 6" apparently.  Not sure its that much my bag but really, I've never seen anything like it.