Does anyone know (nurse) if those vibrating car seat covers help with circulation

I will be taking a long drive in a couple months and I was thinking of buying one of those strap on "massage" (vibrating) car seat covers (seat and back) to help with back pain. I was wondering if the vibration helps with circulation or makes it worse. To help with not getting a pressure sore. Of course I will also be doing pressure releases, taking rests, and splitting the trip up into two days. Thanks in advance!

Does anyone know (nurse) if those vibrating car seat covers help with circulation