Don't buy it.
I purchased this hoping it would ease some of the terrible back pain I have been experiencing in the car. (I have back pain all the time due to disc degeneration but it's worse in the car). Obviously, since my pain isn't muscular, this wouldn't help a ton anyway, but I have found that a massage does ease some of my pain.<br />This thing is just awful. The balls inside are so hard that when it's not in motion they dig into your lower back and it's impossible to sit in the seat.<br />I tried it a few times but now I have to try to sell it somewhere as it turned out to be useless for me.<br />After I got this I ended up getting an orthopedic seat cushion for around $12 that feels fantastic.
Rating: 1 stars