Last September, Castelli announced a new revolutionary fabric that was said to tick every box for performance while being free of PFAs-based chemicals.Developed in collaboration with Polartec, the fabric that is made from recycled polyester yarns debuted on the Castelli Perfetto 3 jacket. It replaced the Gore-Tex Infinium fabric that contained the forever chemicals, which dont break down naturally.Now, Castelli has updated the Perfetto, following consumer feedback, and brought the Aircore fabric to its Gabba jacket.New Castelli Perfetto 4 and Pro The Castelli Perfetto 4 jacket uses a heavier version of the Aircore fabric. Castelli Castelli says it designed the new Perfetto 4 from scratch to be the benchmark for all-condition performance.The cycling jacket continues to use the highly breathable, windproof and water repellent Aircore fabric. However, Castellis global manager Steve Smith says the company increased the fabrics weight from 150g per square metre.Were incredibly proud of the Perfetto RoS 3; it truly is a groundbreaking jacket that raised the bar for all-condition performance. The feedback we kept on hearing from customers, though, was that it was lighter weight than previous Perfettos, and that they wanted more warmth, Smith says.Thats why, with the Perfetto 4, weve listened to that feedback and introduced a new 219g Aircore fabric to this jacket which has more loft and provides added insulation.This means while the Perfetto 3 had a recommended temperature range of 414C, the Perfetto 4 has a recommended range of 412C.If you were a fan of the previous, lighter Perfetto, Castelli has also announced the Perfetto Pro. This version of the jacket is described as a sleek, minimal race piece and uses a 150g Aircore fabric for temperatures from 614C. The Perfetto Pro is a sleek, minimal race piece. The jackets have metal drainage holes, in homage to the original Gabba. Castelli Both the Perfetto 4 and Pro keep the jackets recognisable shoulder tape, but this is now made from a transparent material.They also have metal drainage holes in the rear pockets, which is a reference to the very first Gabba jacket, which spurred Castellis range of wet-weather cycling kit.The Castelli Perfetto 4 costs 280 / $330 / 260 and the Perfetto Pro costs 300 / $350 / 280.Castelli Gabba Pro The Castelli Gabba Pro is a short-sleeve version of the Perfetto Pro. Castelli Although the Perfetto dropped Gore-Tex Infinium last September, Castelli removed it from the Gabba back in 2024. Instead of Gore-Tex, the Gabba R used a fabric with a Japanese-made membrane and a hydrophobic treatment.But now Castelli has released the Gabba Pro, a new version of the jacket, which uses Aircore.Castelli says: The jacket takes the same technology, 150g fabric and close-to-body fit thats been applied to the Perfetto Pro jersey and makes it available in a short-sleeved option.Smith says: Its always an exciting moment introducing a new Gabba into the range as its a jacket that revolutionised the cycling apparel market in the same way Aircore transformed how modern cyclists dress for colder conditions.This, and the Perfetto Pro, are jackets you want to wear when you need breathability, mobility and a competitive edge." The new jackets have two-way zips for ventilation. Castelli When Aircore was revealed, Castelli said the fabrics focus on breathability was partly a result of cyclists spending less time riding in the rain due to the increase in indoor cycling, and climate change.But Smith says that if torrential rain is forecast for your ride, Castelli would recommend the Gabba R for complete waterproof coverage.The Gabba Pro costs 230 / $320 / 260. You may like: Santini's creative director says cycling clothing has "got a little bit lost" but its jersey of the future could be an antidote