1.Ikhwalithi ephezulu ye-polycarbonate (PC)Iqinile futhi ihlala isikhathi eside2.Idizayini eyenziwe ngumuntu, ukucushwa kwamakhethini, ukushintsha kwamahhala.3.Isakhiwo esibambekayo esingangeni manzi Izinto ezivimba amalangabiI-4.UV ukumelana nokushisa okuphezulu