Retractable sun sails or so-called rollable sails offer the customer easy opening and closing at the touch of a button on the remote control. The sun sail is retracted and extended via a diagonal winding shaft and tensioned with a special pulling technique so that it can hold up to 60-70 km/h. When the sail is extended, it stands free and the winding shaft is above the canvas. Due to the high and low points, water drainage is guaranteed even in heavy rain. The maximum size for such systems is 65m².