While generally when the weather is wintery I favour an all-in-one style winter jersey like the Castelli Espresso Air jacket, sometimes it’s too mild for a heavy, membraned top layer yet too chilly for a short-sleeved jersey, even if paired with arm warmers.
This is where products like Madison’s DTE Men’s Isoler Thermal Long Sleeve Jacket come into their own. Worn over a suitable base layer, it provides warmth and, just as importantly, breathability, on those ‘shoulder season’ days. Thermal-style long-sleeved jerseys also work brilliantly under an outer garment, such as a waterproof or windproof, especially if you know that the forecast suggests the barrier layer won’t be coming off at any point during the ride.
