The Castelli Pro thermal mid jersey is a minimalist, close-cut aero jersey that nonetheless provides a bit of warmth when there's a nip in the air.Constructed from mid-weight warmer X-stretch brushed fabric, it is soft and cosy against the skin, but includes just enough elastane to achieve an effective, comfortable race fit. It goes nicely under a vest if you're feeling the chill and has three drop pockets to store that vest in.Add in a smooth-running zipper and a reflective strip at the back, and you have a light, aerodynamic short sleeve jersey with a bit more warmth than is typical, boasting the features you need and none that you don't.Features:Designed for the pros and a favourite among themA minimalist jersey for when it's time for short sleeves but remains chillyMade from warm, lightly, stretchy mid-weight warmer X-stretch brushed fabricRace cut, it offers a close fit without being tightDrop pocket construction aids fit and pocket accessibilityWith YKK Vislon zipper to aid ventingReflective vertical stripe on centre pocketWeighs 188g (medium size)For use at temperatures from 15-20C, 59-68F