As conditions turn toward the winter, our thoughts turn to thermal insulation. Changing temperatures and different applications demand different levels of insulation, though. In the fall, a short, hard effort like a cyclocross race requires less substantive protection than a long session of base building, for example. In the winter, you'll probably want at least two thermal layers, regardless. The Louis Garneau Lombardy Jersey gives you the option of wearing it alone when it's merely cool outside or with an additional base layer for when it gets really cold. The Lombardy is made from Elite Pro Vent 2, a fabric designed to trap warmth and evacuate moisture. Like other LG fabrics, the Elite Pro Vent 2 features a brushed, fleecy lining with a micro honeycombed exterior, the combination of which maximizes the Lombardy's wicking abilities without sacrificing any of its insulation. It's got enough protection to keep you rolling through those base miles in dry, cool conditions, and the UPF of 50 means that you'll be protected from the sun while you're out there doing it. That insulation can be further supplemented courtesy of the Lombardy's semi pro fit, which fits about one size larger than LG's baseline cut, the pro fit, and three sizes larger than the svelte racer fit. Though the flatlock seam construction and brushed lining mean the Lombardy wears comfortably without an intermediate layer between it and your skin, the little bit of extra room is plenty to accommodate a base layer, giving you the option to extend the jersey's effective range by another five to ten degrees Fahrenheit. In case you overheat during intervals or just grinding up that one last hill, you can vent as much or as little as you like by way of the full length front zipper. Three rear pockets offer enough storage for spare tubes, CO2, gloves, warmers, and a snack, and elastic inserts at the cuffs and hem ensure coverage. The Louis Garneau Lombardy Jersey Long Sleeve Men's is available in s...