The Castelli Alpha Jacket - Simple, Versatile and Really Quite Clever
The Castelli Alpha Jacket is at the sharp end of Castelli's Autumn Winter collection. Having developed a reputation amongst amateurs and pros alike as a brand to turn to for bad weather or winter riding, Castelli's Alpha Jacket tops out the range as one of the finest winter jacket offerings of the season.
A Windstopper fabric makes the outer of the Alpha windproof and water resistant but it's the double zip functionality that really sets the Alpha apart. Opening the outer zip on tough climbs or moments of intense effort allows sweat to evaporate without the biting winter wind hitting your core.
Additionally the Alpha is cut closer to a jersey than a jacket allowing it to be worn over a baselayer on bright winter days or layered up with a long sleeve jersey for deep winter riding.