The Castelli Perfetto Light Short Sleeve Jersey is the new game changer from Castelli. I'm sure the Castelli Gabba needs no introduction - it has become the wet weather racing garment for riders of all teams for a few years now and is an ideal jersey for typical British weather. The Castelli Perfetto Light Short Sleeve Jersey brings this technology and thought process to create a new lighter more breathable version perfect for warmer wet days or cool dry summer days. The front is in the windproof and water resistant Windstopper 150 fabric (this fabric is approx. 20% lighter than the stuff in the Gabba) and then the back is in Nanolight fabric (like Nano-flex but a tighter weave and without the fleece lining) this gives the jersey a better fit, superior breathability, similar wind protection and only slightly less water resistance, when compared to the Gabba. So is the Perfetto a jersey that sits between the Fawesome vest and a Gabba - well sort of but then again not at all. What you will find is the Gabba being left for colder days and the Castelli Perfetto Light Short Sleeve jersey pretty much being your jersey of choice from March till November. Castelli Perfetto Light Short Sleeve Jersey Features  Gore Windstopper 150 fabric offers lightweight breathable wind and rain protection. 150 Fabric is on front , arms shoulders yolk and tail. Nano Light fabric on the back and inner arm sheds water but allows significant breathability 3 external pockets Long tail Reflective trim YKK Vislon zipper for easy opening Sizes men's S-3XL Weight 257g (large) Castelli comfort range 10-20c Please note just like the Gabba the Perfetto isn't designed to replace a rain jacket in heavy rain. It is however the ideal option for riding hard in temperate damp conditions, or cool windy days where a normal race jersey isn't enough but a race cape is too much.