Keep your body warm and protected from rain and snow during winter rides with the Castelli Alpha Ultimate Insulated Jacket. This jacket features an insulating layer and an outer wind and waterproof shell that are separated to allow for superior ventilation, each with its own separate zipper to open or close each layer as needed. For added protection against wind and water, the Alpha Ultimate Insulated Jacket features anatomically shaped cuffs, critical external seam taping, and a bonded hem.