If there's one failing of most legwarmers it's that they absorb water like a proverbial sponge. On rainy days they end up waterlogged and providing compromised warmth. The Castelli Nanoflex Legwarmers are perfect for riding in conditions that are both cold and wet.Nanoflex is a proprietary Castelli fabric. The mill begins with Castelli's super-warm and ultra-stretchy Thermoflex fabric, used in many of its winter garments, and then coats the outside with ultra-tiny nanofilaments of silicone fiber. These fibers create a near waterproof barrier to moisture, and raindrops run off the fabric without soaking through. Despite its water-resistant finish, Nanoflex fabric remains highly breathable, keeping you comfortable in almost any conditions.Silicone leg grippers keep the Nanoflex legwarmers in place even on the hardest rides, and ankle zips make them easy to get past even the largest feet. Reflective logos are printed at the knee and below the calf to help you be seen in low light.The Castelli Nanoflex Legwarmers come in Black and in four sizes from Small through X-Large.Product FeaturesMaterial: nanoflexCuff Closure: elasticRecommended Use: road bikingManufacturer Warranty: 30 days