Hope Mono M4 Disc Brake Pads Hope Organic & Sintered Pads are designed to offer increased braking performance. Organic: Composite pads offer all weather braking with medium durability & lower heat generation. Sintered: Pads are high durability, high friction pads offering longer life & greater resistance to hydraulic fluid Buy Hope Mono M4 Disc Brake Pads from Chain Reaction Cycles, the world's largest online bicycle store.