Pearl Izumi built the Men's P. R. O. Leader Bib Shorts with advanced materials, construction methods, and an aerodynamic fit. These race proven bibs use two distinct technical fabrics to deliver the highest standard in cycling apparel design and craftsmanship.Transfer In R Cool combines with Pearl Izumi's Transfer Dry fabric to reduce heat absorption, speed up moisture evaporation from the skin, accelerate dry time, and combat odor. Blending these two fabrics for the bulk of the shorts' paneling means you stay supported, dry, and comfortable on the longest rides. A multi panel design gives you an anatomic fit with structural leg openings that wrap and support your muscles Pearl's seamless 4D Chamois incorporates variable density padding throughout its three layer construction. The chamois foam is 35% lighter and thinner than past generations and uses Pressure Relief Technology PRT with active carbon yarns to optimize riding comfort, blood flow, and thermo regulation.