I’ve used a small one for back support before, but not for the base.
A colleague at work uses one similar to this and it’s helped. Don’t see why it wouldn’t work in the car as well 
Cheers,
Steve
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I’ve used a small one for back support before, but not for the base.
A colleague at work uses one similar to this and it’s helped. Don’t see why it wouldn’t work in the car as well
Cheers,
Steve