Castelli 2014 Nanoflex Cycling Leg Warmer O10537

HOW DO THEY DO THAT We always strive for total performance and total innovation, but sometimes we surprise ourselves. This NanoFlex 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 effective thing weve ever made for keeping you comfortable in all conditions. Its just barely short of a miracle.