Castelli 2016/17 Thermoflex Cycling Arm Warmer - P14039

SOMETIMES IT'S ENOUGH. Our Nano Flex warmers represent the pinnacle of technology. But if you're riding when there's no risk of rain, the Thermoflex products are a little bit softer, a little more stretchy and a little bit less expensive. Warmth and breathability are the same, and of course you're giving up the Nano Flex water protection.