Beautiful off-white Plia chair by Castelli. It's folding and really easy to store. Handy to have around if you need a spare chair but it's not absolutely necessary to hide it away ;-) I saw this one around a desk and it was quite something because the desk was made of dark warm honeyshade wood. This chair in front of that desk was fantastic. Of course it's not always possible to take pictures in people's houses. I have the chance to see so many hidden treasures in the most original interiors and mostly it's very inspiring and stimulating. Anyway, this little one is a classic, still in production. It's part of my childhood also. We had the transparent version and my sister used to have one as desk chair. But the off-white, green and red are the ones I prefer.