Castelli's Nano Flex 3G kneewarmers are designed to be ideal in all weather situations. These kneewarmers are made to keep you warm by being breathable, ensuring sweat isn't built up so that you can stay dry and therefore warm. Nano Flex fabric is also created to be water-protective whilst still maintaining it's thermal qualities to ensure you stay dry and warm when it's wet and chilly outside. Weighing just 89g, these kneewarmers are lightweight to keep you on the move without taking away from your performance. Featuring double-sided silicone allows for these kneewarmers to remain securely in place when you're riding as they provide good grip. And finally, Castelli's flat-lock stitching with a single seam allows your comfort to be optimised when wearing these kneewarmers.