With its race fit, light water repellence and wind proofing, without sacrificing breathability, it will help you to chase PBs in the winter months.Made with 3D mesh, alongside the protective yet airy material, it's a master of moisture management that wicks away sweat to keep you dry, while adding warmth to your outfit.Your winter aero jerseyAero fit minimises dragNano Flex Light fabric blocks wind at the front and backLightly water resistant, combats road sprayWith 3D mesh fabric from Castelli's base layer rangeAdds extra warmth and manages moisture, also highly breathable3x rear pocketsWeighs just 178gMade for temperatures of 10-16°C