I bought the Vivobarefoot One directly Vivobarefoot. For two years now I wear shoes or go barefoot barefoot. I had my shoe closet completely changed. The One is behind the Sole Runner, the "feeling sixteenth famous" barefoot shoe in my shoe closet. The lightweight outer materials allow great flexibility in the thin sole. The shoe has no restraints. The foot is, therefore, provided full as when walking without shoes on itself. The muscles have to work again. Compared to older models Vivo, the sole but no longer depends so by. She sits better on the soles. The toes have a lot of air for their movements. The shoe has absolutely no explosion and no damping. So a radical Barefoot shoe concept. The upper material is air-permeable. Unfortunately, all the "rubber / plastic soles" the problem that you do not have enough ranlassen shoes at the shoe sole air. So many Barefootshoes develop more or less odor, regardless of whether the upper made of leather or plastic. When one of these effects is quite mild, perhaps because of the breathable upper materials. My friend bought the One since early summer, I have him in the late summer. I use it almost daily in everyday life, to work, I have the Breathy Lite (predecessor model) or the Evo. Apart from a bit of color on the outer abgerubbelter rubber ring, the One with us both in materials or workmanship on. A great shoe!