Leather And Anti-Microbial Polymesh Lining (50% Recycled). Linings Are Treated With Anti-Microbial Protection For Long-Lasting Wear. High-Rebound, Ultra-Light Trufoam Midsole For Cushioning And Comfort.Flexible Rubber Outsole With Trufoam For Lightweight Cushioned Comfort.Removable, Molded Footbed With Memory Foam.Durable Rubber Outsole Pods.Leather Working Group Gold Rated Tannery.