Pearl Izumi Elite Thermal Arm Warmers feature a new, softer Thermal fleece fabric with improved stretch, which makes both fit and comfort exceptional. But the PI Dry technology is what really sets these warmers apart, offering permanent water-shedding performance for more warmth in damp conditions. A BioViz logo near the elbow adds reflectivity in low-light conditions. Thermal fleece fabric with water-shedding PI Dry technology for all-weather performance Anatomic left and right specific fit Plush wide elastic binding with silicone gripper for a stay-up fit BioViz reflective elements for low-light visibility SPECS: Fabric: Thermal Fleece SPF/UPF: - Seasons: Cool Weather Visibility: Reflective Water Resistant: Yes