Long sleeved cycling apparel walks a thin line, as many are not breathable, leaving you uncomfortably hot under a heavy layer of material.  The Capo Super Corsa Long Sleeve uses a Winter Micro Quattro Fabric that keeps you warm and comfortable in a wide range of temperatures. Not only do I wear it all summer long in the Bay Area's fog, it kept me warm on recent training rides at 6,000 feet in the Sierra Nevada.