Choose Nano Flex for warmers that are great in dry conditions but also give some extra protection and warmth in wet conditions. Castelli was the first manufacturer to use water-repellent thermal materials for cycling clothing. Castelli's 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