If your ride starts off chilly, but you know it's going to heat up later, you need something that will keep your knees insulated and can be stored easily in your jersey pocket when the day warms up. Louis Garneau knee warmers, with soft-brushed Heatmaxx fabric, will keep your knees at just the right temperature. Special ergonomic cycling fit with silicone grippers at the thigh provide proper placement. UPF/SPF 50 protection. Reflective accents.