What sets Sky-Frame Plain apart is the hidden, seamless transition between the inside and the outside that is completely flush-fitted with the floor: the sliding window glides over an opening in the floor with a width of just 10 mm. The space between these tracks is covered by the same flooring as the interior of the room, which reinforces the feeling of a free-flowing transition between indoors and outdoors. Sky-Frame Plain is perfect for use in warmer regions.