Dressing for the shoulder seasons and the often unpredictable weather they deliver is an exercise in patience, and in not being afraid to turn back to the house after a few minutes if you choose the wrong combination of layers. Rather than sifting through a pile of less than ideal layers before your next ride, invest in Castelli's Gabba 2 Convertible Jacket with Castelli's signature dose of minimalism and class, the jacket manages to be both cold weather jersey and jacket with its removable sleeves, all while delivering a streamlined, contoured silhouette. Like the rest of the Gabba line, the Gabba 2 Jacket boasts a Windstopper X Lite construction that blocks wind and repels water in the event that you're caught in an unexpected shower, while continuously wicking moisture away from your skin as you start to warm up in the cold. While you're stretched out over your bars, stretchy Nano Flex arm inserts keep the jacket moving with you, allowing for more airflow as you ride, and enhance the jacket's ability to attentively follow your body movements in the saddle as you move around.Jackets with zip off sleeves are nothing revolutionary, but Castelli's take on the zip off design is something worth getting excited about, as the brand moves the sleeve zippers to a raglan position off the shoulders to significantly lessen the likelihood of irritation. So, if your morning ride starts with decidedly crisp temperatures and a nagging breeze then warms up several degrees as the sun rises, just zip off the sleeves and stow them in your back pocket to stay cool and dry throughout your ride.