The northwave celsius arctic 2 gtx spd boot features a rugged design and bombproof materials capable of seeing you comfortably through the most brutal aspects of winter this northwave winter boot is a brilliant combination of breathability comfort and protection with a waterproof gore tex membrane that protects against water wind and snow in an impenetrable thermowelded upper the jaws carbon reinforced sole offers a superior strength to weight ratio and delivers excellent power transfer on t