In winter, staying dry is just as important as staying warm. In fact, the two go hand-in-hand. If an interval series or a punchy effort leave you with a sheen of sweat on your skin, then the cold will eventually turn that moisture into clammy chill. Once that sets in, there's no going back. Louis Garneau's 2004 Long-Sleeve Top is a baselayer for cold-weather training from cycling to Nordic skiing, or it can be a stand-alone top for chilly runs. However you use it, the Drytex 2004 material stretches to provide a next-to-skin fit, where it pulls moisture away from you and out into the dry winter air in order to keep you dry, (relatively) warm, and on-point to hit your training goals.