Much has been said and written about Castelli's Gabba protection pieces, but perhaps the enduring legacy of the famed concept is how many other Castelli products carry Gabba features, as well as how many other industry products were developed with serious Gabba influence. For the fourth-generation Gabba the designers started with a clean slate to make a significant upgrade. That involved moving it to water resistance, which meant developing two new exclusive GORE-TEX INFINIUM™ WINDSTOPPER® fabrics. Castelli made the front-facing INFINIUM™ WINDSTOPPER® 205 Warm fabric better insulating, and the inner layer has a light brushing, while the rear-facing INFINIUM™ WINDSTOPPER® 203 Stretch fabrics are lighter, yet more water repellent than the previous Gabba. That resulted in even more capable Gabba, with lighter weight and increased fabric flexibility. Yet here is the Gabba 5th generation, more refinement and a few different design choices, seen in the Gabba RoS2 Short Sleeve Jersey- and yes, it's still referred to as a jersey/jacket, but listed as a jersey.

The important details of the Gabba RoS 2 Short Sleeve Jersey include taped shoulder seams for extra rain protection, a YKK®Vislon® zipper for easy sliding, placket covered for extra wind and rain protection, a dropped tail with large black reflective panel, and new pocket design. One key change for the Gabba RoS 2 was a move from a two pocket system to the more traditional three pocket set-up. Deep, and accessible, this is more inline with a race jersey anyway, which is what the Gabba is often worn over. The second major adjustment was the move to a dual-zipper system, in the form of a top- and bottom-opening YKK® Vislon® model for easy sliding, placket covered for additional wind and rain protection. Subtle, but very useful changes that only increase the usability and versatility of this fantastic piece.

The concept of the Gabba has always been built around a jersey like fit and feel, with warmth and protection that would get you through cool or wet transitional weather in a true performance option. The Rain or Shine (RoS) short sleeve version should ideally be be paired with Nano Flex arm warmers when desired then ridden as just a jersey. The high, soft collar and dropped tail are about the only two features that give away the fact that the piece is more than just a jersey with an aero-like fit and design. Instead of a basic barrier that resists wind and water, the use of the INFINIUM textiles offer near full waterproof capabilities with exceptionally fast moisture transfer that shuns the perspiration that comes with high output intervals and out of the saddle climbs. Keeping dry keeps you warmer and more comfortable, to sustain long training hours without limitations.