Castelli NanoFlex Knee Warmer: We always strive for total performance and total innovation, but sometimes we sur- prise ourselves. This Nano Flex fabric behaves just like our Thermoflex fabric in dry conditions, but then provides unbelievable water repellency when it starts raining. We dont claim that its fully waterproof, but its the most ef- fective product weve ever made for keeping you comfort- able in all conditions. Its just short of a miracle.
Exclusively engineered by Castelli, thermal fleecy stretch Thermoflex fabric is coated 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 or bounce off 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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