About the castelli alpha ros light jacket fitting somewhere on the spectrum between a jacket and your warmest jersey, castelli's most technical light jacket gets a significant performance upgrade this year'. '.strtoupper('r')os stands for rain or shine'. '.strtoupper('i')t's a label castelli give their most advanced products that excel in both dry and wet conditions'. '.strtoupper('f')or dry conditions, you're looking for comfort along with breathability to prevent you from getting wet and chilled from the inside'. '.strtoupper('b')ut with wet weather clothing, you're looking for protection that will help you stay warm by keeping the rain out and letting sweat escape'. '.strtoupper('t')he castelli alpha ros light jacket ticks both of those boxes'. '.strtoupper('b')oth the front and back materials are brand new this season and represent a significant step forward in rain protection'. '.strtoupper('t')hese fabrics are used with reduced seaming, and seam sealing where necessary'. '.strtoupper('c')astelli call this functional waterproofing because while they don't guarantee that no drop will ever enter the jacket, they can promise you that this is their best effort to keep you warm and dry in the widest range of conditions'. '.strtoupper('k')ey features gore tex infinium 150 front and sleeves for versatile and breathable protection from the elements lightweight double layer material with enough rain protection to give you confidence during changeable weather advanced patterning makes for excellent close to body fit with a raw edge waist which lies flat and moves with you functional waterproofing using nano flex xtra dry back for the most significant nonmembrane water protection available whilst still allowing excess heat and sweat to escape pro secco strada inner liner with 2nd front zip articulated collar that fits better whether youre standing or riding3 convenient rear pockets with reflective details and laser cut drain hole about the brand castelli traces its roots back to a fine tailor vitore gianni in the heart of milan, founded in 1876'. '.strtoupper('t')hrough the years, vittore gianni clothed ac milan, juventus and the milan ballet.