Thanks guys, I can't remember at the moment what the material for the back is. But it's stretchy 1/8 inch flat cord but I've done the same pattern with about anything. The weave isn't bad to learn this one is done in the over hand knot style. I bet once I get it going I could bust one out in 10 minutes or so. They do take a minute more than normal but a great way to practice several different tying styles. I'm going to make some shrimp ones one of these days