SwissStop’s disc brake pads are made of a high performance Kevlar, Ceramic, Brass and resin composite material. This Provides excellent braking power with minimal effort at the brake lever. Performance is consistent in both wet and dry conditions and pad life is excellent. High quality springs included with every set. Compatible with SRAM Hydro R disc brakes. Sold in pairs. Now available in sintered metallic compound for improved performance in mud.