KSO ECO Vibram Men's Five Fingers Shoe Military Green Size 11-11.5 Some wear This super comfortable, everyday shoe redefines the core minimalist philosophy of Vibram FiveFingers, through its eco-conscious construction. KSO ECO is the first FiveFingers shoe to feature Vibram’s innovative Ecostep Natural outsole, which is made with more than 90% natural ingredients. This durable sole is flexible and grippy, with a color obtained from 100% natural pigments. The sustainable hemp upper material is soft, form-fitting and super comfortable, while the minimalist outsole (3mm) provides users with a strong connection to the ground. Lightweight and breathable, the KSO ECO is ideal for everyday use, from training to trails to walks around the neighborhood.