It provides four season balcony joy. It can be easily opened and closed when it is wanted. It does not spoil the building’s architecture structure, and change the view. It is not effected by wind, snow, rain or other nature effects, it provides voice and heat isolation and prevents energy losing. It is not against public improvements order. It raises your property’s valve. It does not take much place when it is opened. It is care and cleaning is easy and it provides security. It is suitable for each structure shape.