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.

• Water-repellent thermal and breathable Nano Flex fabric
• Flat-lock stitching with single seam
• Double-sided silicone grippers to keep warmers in place
• 8°-18°C / 46°-64°F
• Supplied as a pair