Any shoe that requires an instruction card in the box is going to pique our interest. Round two of the TDS Niobium Concept 1, a creation that came out of New Balance's innovative Tokyo Design Studios, has hit the shelves. The Niobium is three shoes in one, the mid-top can be unzipped to create a laceless slip-on, and from there, the inner bootie can be removed to create a slipper. In its complete form, the boot features a waterproof exterior, a suitable outer-sole for rugged terrain, and of course, a New Balance specialty, maximum comfort. Now available in a tonal grey MSNB1GY version.