Salomon - SM Expert (Thunder/Black/Mid Orange) - Men's: A high performance, insulated leather boot with a technical chassis for total stability. Upper in comprised of synthetic parts and mountain leather. Gusseted tongue. Lace locking hardware. Gliding eyelet inserts. Rubber randing around the upper. Protective heel cap. Thinsulate lining material. Compatible with all types of crampons. Mountain Contagrip outsole. Advanced Chassis. PU midsole. Ortholite foam insole sockliner.