Castelli's Nano Flex 3G Leg Warmers are the ultimate in versatile warmers. Lightweight, breathable, water resistant and with just enough insulation for cooler temperatures, the Nano Flex 3G uses their signature Nano Flex fabric to make the competition look second rate.  Castelli's Nano Flex 3G Leg Warmers Features Water-repellent thermal and breathable Nano Flex fabric creates a versatile set of warmers Flat-locked stitching with single seam for smooth and comfortable fit Double-sided silicone grippers to keep warmers in place Castelli's Nano Flex fabric has long been renowned for it's weather resistance and thermal properties and the 3G version is the best yet. Offering excellent water repellance and good insulation, the Nano Flex 3G Leg warmers are ideal for changeable conditions. The flat-locked stitching along the single seam to improve fit and comfort, while the double sided silicone grippers help to keep the warmers firmly in place. If lightweight versatile weather protection is what you need, look no further than the Castelli Nano Flex 3G Leg Warmers.