The Hug Chair by cate&nelson
From the designers:
At first sight the assembled Hug does not appear to be a flat-pack low chair. We have taken the best possible advantage of the strengths of formpressed techniques to create a sturdy low chair with flat-pack design principles when developing Hug. It is created out of a single formpressed sheet and requires no complex tools to assemble, just the buttons which function not only as decoration but most importantly; they hold the chair together.
Visit the cate&nelson website – here.