Geo Court II soles are made of robust and ultra-thin material, engineered to maximize sensory feedback by minimizing interference between your feet and the surface. All of Vivobarefoot men’s and women’s shoes, besides the Ultra, feature a Pro 5 puncture-resistant layer. The Pro 5 is Vivobarefoot’s patent that fortifies the bottom of the shoe. According to Vivobarefoot, it’s five times more puncture-resistant compared to soles of other brands.