The Tokyo Design Studio Niobium Concept 1 is a transformable piece of footwear that adapts into a waterproof boot, an outdoor mule, or an indoor slipper. Constructed with stretch rip-stop material and welded overlays, it includes a zipper along the tongue and heel for assembly. lightweight foam cushioning zipper down tongue and around heel for assembly event waterproof membrane rubber outsole stretch rip-stop upper
