The lightest, fastest, and most breathable jacket, great for high-intensity rides or staying at the right temperature in cool conditions. This is the jacket for going fast on those in-between days when it's too warm for a jacket and too cold for a jersey.

It blocks enough air that you don't get cold but lets enough through to keep you drier. Working together with the outer fabric is Polartec® Alpha® insulation in key areas to nearly weightlessly add more warmth without reducing breathability.

The jacket is cut close to body, making it our most aerodynamic jacket. Not that that you need aerodynamics in the winter, but we're firm believers in Fast Is Fun. The close fit also makes it warmer than the minimalist fabrics would normally allow.
 
Product features

• Nano Flex Light woven fabric all around partially blocks wind, but lack of a membrane guarantees maximum breathability
• Polartec® Alpha® active insulation on chest, sleeves, and upper back for extra warmth
• YKK® Vislon® zipper covered to keep wind out
• Stretch sleeve ending easily tucks into glove or can cover glove wrist to keep out the cold
• Close-to-body fit
• 3 rear pockets
• Water-repellent finish
• Reflective detailing on back

 
Buy Castelli Cycling products on www.factorystore.si