Design: Waterproof leather upper for a luxe look and feel Elastic gore stretches for a better fit and easy on/off In-Shoe Comfort: 100% recycled polyester waffle knit lining 30% recycled MAX-COMF sole technology features a dual-density foam bottom with a cushy footbed Thick responsive midsole for lightweight support and stability 30% recycled EVA midsole provides maximum, lightweight comfort Durability & Traction: Rugged Spider rubber outsole for durability and traction Additional Details: Treated with Life Naturals, a responsibly sourced peppermint-based antimicrobial that fights the growth of odor causing bacteria Leather sourced from tanneries certified by Leather Working Group, whose mission is to promote sustainable and appropriate environmental business practices within the leather industry