Baffin - Thunder (Black) - Men's: Versatility, performance and progressive styling in a genuine -40C/-40F winter sport boot. The foundation of the Reaction Series is a rugged, lightweight rubber base and wide-track outsole. Sandwiching Baffin's removable inner boot insulation and moisture management system is a drop-in high density EVA platform and a removable 6mm EVA contoured foot-bed. This configuration results in an excellent balance of thermal insulation, arch support, impact absorption and stability. Waterproof, seam sealed construction and premium uppers provide outstanding value in the sport boot category. High visibility reflective materials enhance safety. Moulded tongue insert and high strength nylon lacing system for improved fit and comfort. Full grain Timberwolf leather and water-proof seam sealed construction. For all types of activities from snowshoeing to snowmobiling, the Reaction Series is an excellent choice for the highly active outdoor enthusiast.