What are the best fabrics for boat seats?

One of the best fabrics for boat seats is a seat vinyl that is UV and mildew resistant. It comes in many colors. You could also use furniture weight Sunbrella fabric to cover cushions on your boat and it comes in solids and stripes. You can find both options at http://greatlakesskipper.com/category-1/14-boat-upholstery.html or http://www.beaconfabric.com/cat210.htm.

Vinyl works well and is affordable and waterproof. Both Sunbrella and Valtekz make quality fabric for boat seats and have online sites for ordering.