The SG-12 Starts with Italian full grain stock, which is the best leather money can buy.The grip guard is designed for the rider to grip the bike while withstanding any heat from the motor. The super strong wishbone "pivot" system surrounds the ankle while at the same time flows with your natural movement to ensure a great fit. The buckle system is made from an aircraft aluminum to allow easy on-offf as well as full adjustability. The plastic exterior is injection molded to with our new shock absorbing heel bumper. To add.. the SG-12 has a soft comfortable anatomic fit with the new indestructable P.U. memory cell foam. These boots are worn and recommended by the best riders in the world.