The Castelli Perfetto RoS 2 Convertible winter cycling jacket is one of Castelli's most versatile pieces, and for good reason. The Castelli Perfetto RoS 2 Convertible has the characteristics of both the Perfetto RoS 2 and the Gabba RoS 2, but then merged into 1 version. With the Castelli Perfetto RoS 2 Convertible winter cycling jacket, you can cycle in comfort from cold winter weather to spring and autumn weather.