A 3 season alpine climbing boot in all leather for multiple conditions and end uses.Impact Brake System (I.B.S.) - A proprietary technology in outsole design where the lugs of the soles are oriented in opposing slanted directions. This opposition increases braking power by an average of 20% and decreases impact forces by and average of 20%.3D Flex - A hinge system used in the ankle area of boots to allow lateral flexibility while still allowing longitudinal lockout for excellent support.Idro-Perwanger Leather (2.6-3.2+ mm) - This premium silicone impregnated rough-out leather is made for us by Perwanger Leather of Italy.  Perwanger has been making leather in the Southern Tyrol region of Italy since 1780 and tans their Idro-Perwanger hides with a special process to make them extremely water repellent while still remaining breathable. This leather is the most durable available and is made from the corium, the strongest part of the leather.Subskin Injection molds the upper chassis without stitching or insertsIdro-Perwanger leather upper is super durable and water repellentGore-Tex liner keeps feet dry while kicking steps in colorsImpact Brake System orients the lugs of the soles in opposing slanted directions. This opposition increases braking power by an average of 20% and decreases impact forces by and average of 20%3D Flex hinge system flexes laterally while still allowing longitudinal lockout for excellent support.