I'm new to straight razors. I am getting the hang of it, but have a new guy question. I bought a Zeepk strop on line. I know it isn't good quality, but i still have a question. One side is obviously leather. The other strap on the strop looks like vinyl on one side and some type of material on the other. Which is for stropping? They vinyl side doesn't seem like it is the right side. Help!