Kalso Earth Shoe Womens Earth Solar Too Black - 7 B(M) US Rubber 3.7-degree incline sole redistributes body weight to help improve posture and reduce joint stress. Anatomic arch support helps promote a natural stride and proper heel strike. BioFoam cushioning, made of 70% recycled content, absorbs shock. Leather upper, leather / brushed fabric upper lining, leather sockliner, BioFoam insole. Biodegradable polypropylene midsole, rubber outsole.