Nano Ceramic Protect Fabric Protector convertible soft top ceramic coating effectively protects textiles from dirt and is extremely water-repellent. Convertibles are chic, but they’re also sophisticated. It is easy to notice a lack of or incorrect maintenance, especially with the soft top. Because of the roof construction, care is very important for the convertible top. The roof is constantly exposed to the effects of external conditions and therefore it must be protected with the best impregnation agents.