Premium leather uppers. Leather is from a tannery rated Silver by the Leather Working Group for its water, energy and waste management practices. 100% recycled PET faux-fur linings are made entirely from recycled plastic bottles. New flexible forefoot construction provides greater comfort. Exclusive anti-fatigue comfort technology provides all-day comfort and support. Green Rubber™ lug outsole is made with 42% recycled rubber and designed for traction.