In 2010, Castelli introduced the Gabba to the pros and changed the way they compete in the rain and cold. And also the way they dress for cool-weather training. It turns out that the Gabba is also the perfect piece for non-pro cyclists when the weather turns cool, keeping your core warm and dry without being too hot. The latest Gabba is the fifth generation, and the current version is primarily waterproof while retaining the breathability and wind protection that has always made the Gabba so great. It uses two separate Castelli-exclusive GORE-TEX INFINIUM™ WINDSTOPPER® fabrics: one that’s warmer and 100% waterproof on the front, shoulders and sleeves, and one that’s lighter, more breathable and stretchier on the back, enough to protect you from the spray that hits your back. The “2” in the name refers to the upgrades that have been made to the latest version, including a YKK® Vislon® zipper that opens from the top and bottom for more adjustable ventilation. The reflective panel on the back is more visible, the upper shoulder seam has been moved to the back, and the three pockets can accommodate more stuff. Typically, the Gabba will be worn over a sleeveless base layer and short-sleeve jersey, and paired with Nano Flex arm warmers in cooler and/or wetter conditions, or Seamless arm warmers in milder weather. The Gabba RoS 2 W is a must-have for fall and spring rides.