When the weather outside is frightful, the Summit County from KEEN is delightful. The rugged rubber outsole reacts to cold weather by hardening for a tough grip on packed snow. Since toes are the first to get cold, this boot features 450-gram KEEN.WARM insulation in the toe area. The remaining upper is warmed with 350-gram KEEN.WARM insulation. Combined with a KEEN.DRY breathable waterproof membrane, this boot has all the makings of the ultimate winter boots.