Anatomically designed specifically for the knee, the Pearl Izumi Elite Thermal Knee Warmer offers specific and effective comfort and warmth for serious riders. They will give you full freedom of movement without bunching or chafing. ELITE Thermal Fleece panels are used to offer insulated warmth and to stretch comfortably with the rider as they move. The knee warmers use a Plush Wide elastic band with a silicone gripper to stay firmly in place, preventing any annoying mid-ride wardrobe adjustments. As a final touch, the knee warmers use reflective elements to keep you visible in low-light situations for your safety as you ride.