HOW DO THEY DO THAT?
Castelli always strives for total performance and total innovation, but
sometimes they surprise themselves. The Castelli Nanoflex Cycling Knee Warmer
behaves just like the Thermoflex in dry conditions, but then provides
unbelievable water repellency when it starts raining. Castelli doesnít claim
that itís fully waterproof, but itís the most effective thing theyíve ever made
for keeping you comfortable in all conditions. Itís just barely short of a
Great in every possible