Modulation coupled with longevity Our Gold Label HD ceramic brake pad was designed with e-mountain bikes & heavier riders in mind. Made with proprietary blends of KevlarA(R), MTX CeraEVOA(R) ceramic materials and other Japan-sourced additives and modifiers, we are bringing the performance benefit of ceramic to the cycling industry. Who is the Gold Label HD for? - eMTB&';s: The heavier weight of an eMTB, or e-bike in general, requires brake pad material that hasa higher tolerance to heat and water. - The Clydesdales: If you&';re 200+ pounds, this is really the performance brake pad compound you&';ve been looking for. - Steep Terrain/Long Descents: Choose Gold Label HD to eliminate brake-fade, while maintaining outstanding modulation in adverse terrain.