What is Marine Vynal? I see a lot of projects using it lately, but have no clue what it is, where to buy, or how to embroider on it.

It's the vinyl they use to upholster boat seats,It;'s waterproof and comes in lots of colors, A lot of the fabric stores sell it like Joann's or Hancock. It's easy to cut and does not ravel so it makes it nice for embroidery projects, now i just have to get some