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 600-gram KEEN.WARM insualtion in the toe area. The remaining upper is warmed with 400-gram KEEN.WARM insualtion. Combined with a KEEN.DRY breathable waterproof membrane, this boot has all the makings for the ultimate winter footwear.