Castelli – Nano Flex Armwarmer


Exclusively engineered by Castelli, they take their thermal fleecy stretch Thermoflex fabric and coat it with millions of tiny silicone nanofilaments to create the most water-repellent fabric finish ever. Drops of water stay as spherical balls on top of the fabric without leaving a trace. The silicone nanofilaments also trap a layer of air between them for excellent insulation and prevents water droplets from soaking through the coating to the fabric underneath.

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