"Seat piping" refers to the decorative trim or embellishment, often made of fabric or lace, that is sewn around the edges or seams of a chair or seat cushion. It adds an aesthetic touch and enhances the overall look of the furniture. Full definition
If you're willing to spend more, you can be treated to white - on - black leather seats, contrasting seat piping, ambient lighting and push - button start. (kbb.com)
Quad - port exhaust tips give the model a bit of extra personality, as does blue leather seat piping inside the cabin. (automobilemag.com)