We sell 3 types of clear vinyl window material. Our "roll vinyl" is least expensive but flexible and is available in 20 gauge and 30 gauge thickness. In our canvas shop, we use 20 gauge for porch enclosures and 30 gauge for enclosures on small run-abouts and pontoon boats. Crystal Clear is roll vinyl that has been pressed and polished for better clarity. Strataglass goes one step further with a polymer coating which makes this "glass" more resistitant to scratches and UV damage. Both Crystal Clear and Strataglass are available in a thickness of 40 gauge and are flexible enough for roll-up "smiles" on enclosures.