Pearl Izumi Warmers Size Chart The ELITE Thermal Knee Warmers have been updated with water-shedding PI Dry(TM) technology for all-weather performance, making them even better in cold and wet weather than before. Warmers are the easiest way to add knee-saving warmth to a pair of cycling shorts. These knee warmers are sold in pairs and have unisex sizing. Features: - Thermal Fleece fabric with water-shedding PI Dry(TM) technology for all-weather performance - Anatomic construction eliminates bunching through your full range of motion - Plush wide elastic binding with silicone gripper for a stay-up fit - BioViz(TM) reflective elements for low-light visibility - Unisex sizing - 56% nylon 30% polyester 14% LYCRA(R) elastane