NANO FLEX 3G ARMWARMER NANO FLEX ALL-CONDITION WARMERS   Choose Nano Flex for warmers that are great in dry conditions but also give some extra protection and warmth in wet conditions. We invented the category of water-protective thermal fabrics, and Castelli's proprietary Nano Flex is often imitated but never equaled. No compromises for any conditions.   Castelli Nano Flex 3G Armwarmers Features Water-repellent thermal and breathable Nano Flex fabric Flat-lock stitching with single seam Double-sided silicone grippers to keep warmers in place 8°-20°C / 46°-68°F Weight:66 g