Sierra Auto Tops BMW 1996-2002 Z3 Roadster Convertible Top, Stayfast Canvas, Bordeaux First quality Haartz Twillfast II cloth with a original dobby weave lining The entire top is cut from the same bolt of cloth for consistent color and twill pattern DOT rated heavy gauge sewn-in plastic (clear vinyl) window for excellent visibility Factory-style sewn-in die-cut plastic retainers pre-drilled for easy, accurate mounting Windows are double stitched and include finish trim piping on the outside