The folks at Pearl Izumi are known for packing at on of value into everything they make. The P. R. O. In R Cool short isn't just an example of this, it's the poster child. The P. R. O. combines high tech materials with non nonsense anatomic design for a cool, comfortable, warm weather bib short that won't break the bank. The P. R. O.'s main body fabric is lightweight, stretchy, Transfer In R Cool. It's been treated with ColdBlack, which reduces the surface of the fabric. The short also made with Minerale, a yarn that's infused with crushed volcanic rock that actively pulls moisture away from the skin and accelerates dry time to keep you dry and odor free. The bib straps are made with Direct Vent mesh to promote cooling airflow. For the insert, Pearl izumi chose its Anatomic P. R. O. chamois. The insert's 3 layer construction incorporates variable density padding and a four way stretch anatomic shape. This shape uses Pearl Izumi's Pressure Relief Channel to eliminate numbness and promote comfort during long rides.