There are plenty of chairs out there that collapse into more portable forms, but this director's chair is undoubtedly the most convenient to carry. It can fold to a width of only four inches.
Because the chair folds into such a small package, it can be easily stored and carried in the included messenger bag. It's seems to be fairly strong too—it weighs only 4 kilos, but it can support up to 110kg. This sort of thing would be great when golfing, camping or attending an outdoor event—but be prepared to pay for the added convenience. This director's chair will set you back $US130. [Hammacher Schlemmer via The Design Blog]