The EasyGo Chair by Thonet is an interesting chair that defies categorization. It has castors for task chair like mobility, yet it stacks, or folds and nests for storage. Perfect chair for multipurpose conference rooms where you may have a big meeting one day, or a gang of temp workers the next. The back rest has a degree of flex built in, and it can be had with arms or without. Several different colors, upholstered seat or plastic shell.