Ergon gp1 bioleder grips the ergon gp1 bioleder grips are the original ergonomic grip the gp1 provide exceptional comfort thanks to the material used and the quality construction the unique shape is made from 100 german tuv certified rubber compounds and premium leather sourced from bavaria germany bike grips leather grip developed with quoc pham footwear maker caring oil included forged brushed aluminium clamp brown long