Design: Foot-hugging upper ensures a comfortable and secure fit GORE-TEX keeps your feet dry from the outside as well as from the inside Materials made from recycled products such as PET bottles or material waste Quicklace(R) lacing system In-Shoe Comfort: Sensifit construction offers precise, optimal foothold and classic Speedcross comfort EnergyCell+(TM) high-rebound midsole compound provides exceptional energy return along with substantial cushioning and durability Durability & Traction: Mud Contagrip(R) outsole built for maximum grip on loose, soft, rugged, and uneven surfaces Mud Contagrip(R) uses sharp lugs made from a compound that focuses on adhesion