Castelli introduced the men's long sleeve Trasparente 3 Wind Full Zip Jersey with a pretty outlandish claim. It will make you want to do intervals in January, Castelli promises us, which is a claim we take with a grain of salt. Nobody wants to do intervals in January, but some of us don't have a choice. For the riders at Cannondale Garmin who use the Trasparente 3 for off season training, the obligation is professional for us, though, the obligation is one of pride. If we don't hit those base mile numbers, we won't have the form to hit our early season goals. The jersey features two materials: Windstopper X Lite material on the front and sleeves and Warmer fabric across the back. The Windstopper protects a cyclist's engine by blocking the wind generated while generating watts, and it adds a touch of water resistance to fend off winter road spray. The Warmer fabric on the back is thermally insulating, but it breathes in order to keep your engine from overheating. Too hot, and you sweat sweat, and you're eventually riding in a sheen of frigid, clammy moisture. By regulating temperature and breathing, the Warmer fabric prevents this. Both fabrics are also stretchy enough that Castelli cut the Trasparente 3 to fit like a jersey, not a flapping winter jacket. The Trasparente is finished with a full length Camlock zipper and a Jacquard elastic to keep the waist in place. The usual complement of three rear pockets is supplemented by a more convenient, protected chest pocket, and reflective detailing on the rear hem presents an attention grabbing shine to traffic approaching from behind in the kind of inclement conditions where the Trasparente's protective materials will be most needed.