Upper, tongue, collar lining made of 100% Cordura® recycled polyethylene tetraphyte (rPET) textile. Water-resistant, PFC-free DWR-treatment for comfort in damp conditions. Laces made from 60% rPET textile. Polyurethane sockliner uses 50% Soybean oil. Sugarcane-based EVA midsole with 30% bio-based materials. Strobel board made from 87% rPET material. Vibram® N-Oil rubber outsole provides great traction and is 90% petroleum-free. X on tongue from final sale