Sierra Auto Tops Mazda 1990-1997 Miata Convertible Top, Cabrio Apex Vinyl, Black Factory style cabrio vinyl cut with automated computer guided equipment for accurate patterns Material is a premium 38 oz. Cabrio Grain Vinyl for that original look and feel Window is DOT rated and has been heat-sealed to Top for durability The window is an OEM quality press polish plastic for superior visibility Stitched with matching colors using the finest bonded polyester threads