Large house fronts and wide shop entrances can be closed and reopened conveniently and barrier-free across the entire area with the SUNFLEX horizontal sliding wall systems. The individual glass panels are not connected to each other. Thus, they can be parked in a space-saving manner not only at the ends, but in a position to be determined individually. Since the system does not require a floor rail at all, no connections are necessary in the floor area. This also makes them ideal room dividers and dividing walls.