Castelli Nanoflex Knee Warmer

The Nanoflex Knee Warmer by Castelli is made from NanoFlex fabric which behaves just like Castellis

The Nanoflex Knee Warmer by Castelli is made from NanoFlex fabric which behaves just like Castellis Thermoflex fabric in dry conditions, but then provides unbelievable water repellency when it starts raining. Although its not fully waterproof, but its the most effective thing Castelli have ever made for keeping you comfortable in all conditions.

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