These shoe designs are sophisticated and classic with modern twists sprinkled throughout. And most importantly, they are healthy for developing feet. The soles are made of extremely flexible rubber which is great for outdoor use while allowing the foot to flex in all the right places. They're also made of butter soft leather with a breathable leather lining and padded collars for comfort. Finally, See Kai Run shoes are easy to get on and off with Velcro closures that ensure a great fit.