It's Called Marinac from
www.landsend.com. I bought a jacket and it's AWESOME! I can't feel the wind on me at all but it still light enough not to make me too hot. We also bought a blanket made of the same material. Land's End will embroider your name (or your boat's name) on it too for only $5.00. It's a good product. I am very happy with it.
I also went down to the local Walmart/Target and bought polartech hats and gloves. I also bought some fleece slippers that cover your entire foot up to and over you ankles. That helps keep the tootsies warm. The only thing to remember is to get some with a hard sole so the bottom doesn't get wet, but not too hard so that you scuff your vinyl. Of course, fleece or polartec pants too.
This is a pic of Tate and I all warm and cozy on a rainy afternoon. I am wearing the Marinac jacket.