PR MD Shoes, Black/Red, Size: 10 Mens Men's Brooks® PR MD 4 :: Leg it out with the new PR MD 4 spikes, with a molded insole providing just the right amount of cushion, ultra-thin shark skin on the outsole and a sturdy Pebax® Rnew spike plate. Top them off with a streamlined no-sew upper and your will be ready to fly. NEW WITH TAGS Learn More