Castelli Flight Jacket AirCastelli's lightest, most breathable and fastest winter jacket, the Flight Air Jacket is ideally suited to higher-paced riding in cooler weather. Polartec® Alpha® insulation deals with colder temperatures too. There are days on the bike where a jersey, gilet and arm-warmers just aren't enough but a heavyweight winter jacket is just too much. The Flight Jacket Air has been created to bridge that performance gap.Made from a stretch-woven fabric, it blocks most of the wind. But enough makes it through to your base layer to speed up sweat evaporation so you're left drier and more comfortable. A water-repellent finish also provides protection during damp days where low clouds and mist hang in the air. On the inside, Castelli deploys Polartec® Alpha® insulation across the chest, sleeves and upper back. In combination with the partially windproof outer, it offers adaptable warmth with a minimal weight penalty and the benefit of excellent breathability too. While aerodynamics isn’t a primary concern in winter, the Flight Jacket Air is still cut close to the body for speedy performance. This lets you slip through the air easier and saves some precious energy as you’re not being dragged back by flapping fabric.An easy-sliding YKK® Vislon® zipper makes it quick and simple to regulate airflow and temperature. 3 back pockets can be loaded up for a day on the saddle. And with reflective details, you’ll be visible when the daylight begins to wane.Features:Materials: 78% Polyester, 22% ElastaneNano Flex Light woven fabric all around partially blocks wind, but lack of a membrane guarantees maximum breathabilityPolartec® Alpha® active insulation on chest, sleeves, and upper back for extra warmthYKK® Vislon® zipper covered to keep the wind outStretch sleeve ending easily tucks into a glove or can cover glove wrists to keep out the coldClose-to-body fit3 rear pocketsWater-repellent finishReflective detailing on the backWeight: 249gSuggested Temperature range: 6 to 15 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.