Introducing Castelli's new and updated Nano Flex+ Knee Warmers. All the protection of the Nano flex warmers with additional Nano Light insert for extra stretch to give you a better more comfortable fit.
Protect your knees from the cold on descents and chilly morning rides. A set of knee warmers adds versatility to your bib short and are great for spring and autumn climates. Castelli's Nano Flex+ Knee Warmers are highly water resistant and thermal, giving you premium protection.
More Flex, More Nano
Nano Flex knee warmers have been in Castelli's collection for seven years, and they have now found a way to improve them! Introducing Nano Flex+ Knee Warmers with an added insert on the back in Nano Light fabric to help them bend around your knee whilst not compromising on water protection. They are even more comfortable than before due to more flexibility.
Nano Flex Fabric
Exclusively engineered by Castelli, NanoFlex consists of Thermoflex fabric with millions of tiny silicone nanofilaments on the surface to create the most water-repellent finish ever. In wet conditions, water droplets simply bounce off the fabric without leaving a trace. The silicone nanofilaments also trap a layer of air between them for excellent insulation and prevent water from soaking through to the fabric underneath. In dry conditions, Nanoflex provides the same warmth and feel of regular thermoflex fabric. NanoFlex is not completely waterproof but maintains full stretch, breathability and freedom of movement for weatherproof protection with un-compromised performance in all conditions.