The Nano Flex 3G Armwarmers have been designed by Castelli in order to give you warmth in all weather conditions during the winter and cooler months. To keep you warm, these Armwarmers have been made for breathability to prevent any sweat building up when you're riding keeping you dry in the winter breeze. Featuring Castelli's Nano Flex fabric that's designed to be a thermal material that's also water-repellent in order to keep warm when the weather's on the nasty side. With a combined weight of just 66g you've got a lightweight pair of armwarmers that'll have only keep you in the saddle for longer. To ensure these armwarmers don't give you any hassle by slipping down when riding, the Nano Flex armwarmers are fitted with double-sided silicone which keeps them securely in place. Finally, Castelli's flat-lock stitching with a single seam means these armwarmers ensure your comfort is optimised throughout your ride by preventing any irritation.