Purchased used, tried on once. Runs large, compared to most other Vivobarefoot shoe styles. EMBRACE YOUR HUMAN NATURE The best piece of technology ever to be put in a shoe? The human foot. So let's set it free. You've got everything you need, naturally. When it comes to nature, don't waste a scrap. The Opanka Sandal is for barefoot wanderers who put feet and planet first. A cross-strap sandal with a barely-there sole, made from premium leather production scraps. URBAN Stripped-back soles for barefoot living — so you're never too far from nature, even in the city. FIT, FEEL, FLEX For natural stability, natural sensory feedback and natural strength. MINIMALIST OUTSOLE The Minimal Sole offers maximum underfoot sensory feedback natural style. The 4mm sole and signature hexagon tread is made in Portugal with natural rubber blend./span> Embrace your human nature. The best piece of technology ever to be put in a shoe? The human foot. So let's set it free. You've got everything you need, naturally. TREAD DEPTH 0mm SOLE BASE 4mm PRODUCT INFO: MINIMALIST OUTSOLE Maximum underfoot sensory feedback. NO INSOLE No insole, bringing you even closer to the ground for the full barefoot experience. LEATHER FOOTBED Take your socks off and enjoy the feeling. MATERIALS & TRANSPARENCY UPPER Vamp, Quarter, Tongue, Collar, Eyestay (100% Metal Free Leather) LINING Collar and Tongue Lining (100% Metal Free Leather) OUTSOLE 30% Natural Rubber, 70% Synthetic Rubber MADE IN PORTUGAL