Castelli Men's Pro Thermal Mid SS Jersey, 2023

Ideal for cool days when you still want a short-sleeve jersey but need something a little warmer to take the chill off. The fabric is lightly brushed on the inside, and the bit of elastane gives a perfect stretch fit. We'll also use this jersey with arm warmers and a vest on cooler days — either an Aria Vest that will go in a pocket once the air warms up, or a Perfetto Vest for a day that will stay cool. This jersey gives that extra level of comfort underneath. As a piece designed for the pros, it stays wonderfully minimalist: three rear pockets, easy-sliding YKK® zipper, sleeves cut to just above the elbows. But we've added a reflective stripe to help keep you visible.