This upgraded version of the best selling Pearl Izumi Thermal Cycling Knee Warmer features the ELITE Thermal Fleece fabric which provides superior warmth, stretch, and recovery.Features: Anatomic cut front-to-back construction eliminates bunching through the full range of motion Elastic binding with silicone gripper for a stay-up fit Reflective elements for low-light visibility Temperature rating: +/- 5 degrees Fabrics: 56% nylon 30% nylon 14% elastane Colour: black