The Castelli Perfetto RoS Convertible Jacket makes the already highly versatile, breathable yet weatherproof Perfetto jacket even more useful! That's because it shares all the same great features, with the addition of a vent at chest level and zips above the elbows, which will allow you to turn your long sleeve jacket into a short sleeve Gabba. You can therefore leave your sleeves at home when it's mild, take them off and stow them in a jersey pocket if the weather changes, or keep the sleeves in place to enjoy the full protection features of the Perfetto. There's also room to add layers underneath to extend its usefulness over all four seasons. The jacket is made from two different GORE-TEX INFINIUM WINDSTOPPER fabrics, one fleece-lined and water resistant for warmth, used at the front of the jacket where the worst of the weather will hit, and another that stretches for a better fit and allows air to circulate, used at the back. This second release of the Perfetto has been improved with an extra pocket for added storage, better reflectivity at the back, a two-way zip for better temperature control, a roomier yet still race-ready fit and improved placement of the taped shoulder seams for better rain protection. Buy the convertible model if you cycle a lot in changeable conditions or if you do a lot of travelling, whether internationally or within the UK. When space is at a premium, having two jackets in one will allow you to fit more essentials. Castelli recommends packing the essentially waterproof Idro Pro jacket alongside your Perfetto RoS Convertible to prepare for the full gamut of cool conditions. Features Is it a Gabba? Is it a Perfetto? You choose, weather depending Rain or Shine categorisation indicates wet weather protection is paired with breathability Still with race fit, but allowing more space around the chest, shoulder and biceps Brushed, water resistant GORE-TEX INFINIUM WINDSTOPPER 05 fabric at the front is exclusive to Castelli Light, stretchy and breathable GORE-TEX INFINIUM WINDSTOPPER 0 at the back Taped seams now set further back on the shoulder for improved rain protection Covered, smooth-running YKK Vislon zipper opens from the top or bottom Zippered ventilation opening at side of chest roomy rear pockets, with reflective panel at the bottom For use at temperatures from 4-16°C