Pearl izumi warmers are consistently our best sellers thanks to the anatomic construction that eliminates bunching and the durable fabric that doesn't stretch out over time. Made from Pearl's P.R.O. Thermal Fleece fabric, the thermal knee warmers provide optimal warmth on cold rides. The Nylon finish will keep moisture from soaking through in a light drizzle. An elasticized gripper on the upper cuff holds them in place while reflective logos provide low-light visibility.