Hi Bill,
If you plan track work with the car this might not be the thing to do. If the SCCA or NASA sanctions your track day, and many are since they use SCCA/NASA corner workers to staff it up, then you might be allowed to run. They look cool, but I'm using metal canister filters. I'm pretty sure our local BMW group that puts on a lot of track days would not allow it either, despite the fact that you can run with normal seat belts.
Ron