30-Gauge Clear Vinyl Multipurpose Fabric - 54-Inch Wide Waterproof Material for DIY Projects, Tablecloths, Upholstery & Crafts - 1-20 Yard Rolls (10 Yards) - Perfect for Home Decor, Outdoor Covers & Protective Applications

We have used this to replace existing windows in original canvas on our boat. It was easy to cut, and easy to sew in my non-heavy-duty sewing machine. They are holding up pretty well, for being subject to UV rays and salt-pray on a routing basis. We have also, this year, used it to make covers for the windows of the wheelhouse, adding an extra layer of insulation for the winter. So far, so good, although we have not yet had any “real” cold (single digits).