The Hayes Sintered-Metallic Disc Brake Pads are perfect for downhill racing, or day after day of shuttle at the ski hill. Muddy conditions can act like sand paper between your disc and your brake pads and accelerate pad wear. This friction material is your best bet in these conditions for consistent wet power. The Hayes Sintered-Metallic Disc Brake Pads are virtually unaffected by rain or snow. As the trail changes around you, the braking power remains the same.