Earth Fey 2 buckle closure 3.7 degree incline helps strengthen muscles, improve posture and alleviate joint stress. Anatomic arch support helps encourage an easy, natural stride. Eco-friendly BioFoam cushioning absorbs shock for soft, comfortable steps. Leather upper, polyurethane upper lining, leather sockliner, BioFoam insole, E-Max outsole. Care: Buff with a leather cleaner or polish. Wipe off with a dry cloth.