Description of Keen Summit County Boots 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. Features: Upper: Leather, Mesh Weight: 21.4 oz / 607 grams Lining: KEEN.DRY™ Waterproof / breathable textile Rubber: Dual Climate Carbon Non Marking Rubber KEEN.DRY™ waterproof breathable membrane 450g KEEN.WARM™ toe insulation 300g KEEN.WARM™ upper insulation DUAL CLIMATE RUBBER Outsole Speed hook lacing system Thermal heat shield footbed Moisture-wicking lining Molded rubber Shellback™ heel support