The buttons have perforated holes and make the vinyl material breathe and provide some ventilation for the driver. Japan market TE27s, TA22s Hakosuka and KenMeri GTR's stock vinyl upholstery feature the buttons as well.
Well done sir. hillyb:awesome. i've been thinking about something like this lately
:lol:Now the serious question... should I do this to my stock seats? All I have is a drill and some washers I found in the garage.
edit: and super glue.