Sorry I bought it.  Doesn't fit right.
It does work but I'm sorry I bought it.  The thing doesn't fit tight enough around my neck in spite of the velcro straps to tighten it.  I must have a short neck, too, because I do not need three layers.  Comes with no instructions.  If you do get it, when you are finished, release the air slowly.  I took the collar off and my poor neck felt kind of wonky so I immediately put the collar back on and released the air slowly.<br />I get much better relief from the cervical posture correction brace I bought, which actually helps my neck tremendously.
Rating: 1 stars