Product details • Block heel • Fastening: laces and zip • Round toe. Uppers: 100% leather. Lining: 100% polyester. Cushioning: 100% polyester. Sole: 100% foam. Leather from environmentally-certified tanneries. Leather Working Group (LWG) certification is an internationally recognised certification which assesses the environmental performance of tanneries (covering energy and water consumption, waste water, air emissions etc.).