Built for those extra cold days out on the roads, the Castelli Nanoflex Knee Warmers are made from innovative fabric to deliver unbelievable water repellence for when the weather takes a turn for the worse. Keeping you comfortable in a range of conditions, the practical Castelli Nanoflex Knee Warmers are a must have for dedicated riders who battle on throughout the colder months.Features:Water-resistant NanoFlex fabricDouble-sided silicone grippers to keep warmers in placeComfort range 10-16cWeight: 164g (pair)Fabric: 86% Polyamide 14% Elastolefin (Olefin)