Hi! The stuff is called Tuftex. You can get it in crystal clear, smoked, translucent or opaque. Translucent is much cheaper than clear or smoked. It is very smooth so the snow will slide off as long as your pitch is great enough, at least 4/12. What about summer, if you get the clear it will get very hot if your coop isn't shaded. I have a combination of clear and opaque on mine. Good luck!