What�s the biggest problem with arm warmers? �They don�t taste very good!� What?! Who are you and how did you get in here? No, the problem with arm warmers is they only work in dry conditions, that�s why the brilliant minds at Castelli invented the Nanoflex Arm Warmer. Made of Nanoflex fabric, which is essentially their super-warm and ultra-stretchy Thermoflex fabric that is then coated with nanofilaments that cause raindrops to run off of the fabric without soaking through, they are warm, water resistant and still highly breathable, so you�ll stay comfortable in almost any conditions. They are some of the best arm warmers around, and the only arm warmers you�ll ever need.
Water -resistant Nanoflex fabric
Same breathability , stretch, and warmth as our standard Thermoflex warmers
Double-sided Silicone grippers keep the warmers in place
Great in every possible condition