While our competition spends the winter inside on a trainer, we continue to hit the road with the Castelli Alpha Doppio RoS Jacket, a winter cycling jacket built to bring us warmth and protection against the elements. GORE-TEX INFINIUM WINDSTOPPER 150 fabric blocks out the wind and helps repel raindrops to keep us dry and comfortable when storms roll in, while the Polartec Alpha Direct insulation keeps us warm no matter the conditions.