Artifort model 411 Nuvola designed by Gerard van den Berg in 1993. It is a rare prototype.
Chair has 4 coarse zippers on the 4 corners.
Chair is about 28 years old but still looks very good. The fabric is still completely good, the interior too. There is some discoloration at the 4 zippers.
There is also a 2.5 seater sofa. Same model, also with the zippers. The chair is red with bluish. The sofa is purple blue/indigo. I will also advertise the photo of the sofa here as soon as possible.