NanoFlex fabric behaves just like Castelli’s Thermoflex fabric in dry conditions, but then provides unbelievable water repellency when it starts raining. It’s not fully waterproof, but it’s the most effective thing Castelli have ever made for keeping you comfortable in all conditions. It’s just barely short of a miracle. 

Castelli strive to produce the most advanced clothing available for cyclists seeking maximum performance. Their quality and heritage has resulted in the name Castelli becoming synonymous with innovation, quality and performance. 

Features:

• Water-resistant NanoFlex fabric.
• Same breathability, stretch and warmth as Castelli’s standard Thermoflex warmers.
• Double-sided silicone grippers to keep warmers in place
• Great in every possible condition.
• Weight 164g (pair).