Helps your neck and back
I bought this for my daughter who was having very bad neck issues.  I used one for months (one day the wind was so heavy it blew out of the car), and realized that the swivel helped the strain in my neck and back.  I should have ordered two this time!  The only improvement I would make on this is that the stitching could be sturdier.  Flawless transaction.
Rating: 5 stars