Design: Recycled PFC-free synthetic upper material mix to create the ideal sustainable hiking shoe Smooth tongue fit for comfortable all-day wear TEXAPORE ECOSPHERE 100% recycled membrane offers sustainable waterproof protection In-Shoe Comfort: 100% recycled tricot lining for added comfort Recycled OrthoLite(R) PU-rubber insole for optimal cushioning VIBRAM cork-mixed EVA midsole provides comfort and additional sustainability Durability & Traction: VIBRAM ECOSTEP outsole for a secure grip on demanding trails Rubber toe protector for added durability and protection Additional Details: Ideal for extended day hikes Lace hooks made of recycled zinc