Super thick 6 ounce oil tanned leather uppers are contoured to fit your leg precisely for incredible support and comfort.Heavy duty zippers allow for a quick, convenient entrance/exit from the boots.A 6 mm thick three part liner, quilted from a wicking durable synthetic, 400 gram Thinsulate Ultra Insulation, and finally 3 mm of wool felt.Hand-made rubber outsoles are vulcanized for durability and feature steel shanks with double thick midsoles.Traditional tractor-tread outsoles are non-marking and provide footing on wet or dry ground. Questions? Leave a comment below!