You can open and close only one of the folding doors with 5 pairs and 1 pair. You can use it like a door.
It can be folded, unfolded, and expanded to accommodate space.

Rubber finish at every junction between the doors.
Internal temperature does not escape, outside temperature does not enter.
You can see a lot of insulating effects.

Therefore, it helps to reduce electricity taxes in summer and gas taxes in winter.