The first real snow of winter has blanketed the trees and covered the roads, but that's just an easy excuse for the weak legged, faint of heart, fair weather riders to head for the garage. For the dedicated and well equipped, the cold weather means empty roads and increased solitude but it doesn't have to mean frostbite and suffering. Mavic's Ksyrium Pro Thermo Men's Jacket is a highly advanced technical piece for cold weather riding, designed to take care of all the details so your torso rides happily even when your hands are going numb and your breath is freezing to your face. Staying warm in the saddle is difficult, because climbs, descents, sprints, and moderate tempo stretches all require varying amounts of exertion basically, you're in danger of sweating and then freezing solid. Mavic got around this issue by designing the Ksyrium with a removable thermal inner shell, so you can alter your insulation for a given ride. The inner shell is made of PrimaLoft Sport, a lightweight and high warmth softshell fleece, and features a Warm Shell Wind windproof membrane to ensure that cold gusts don't suck the heat out of your engine. The lining of the inner jacket, Warm Wick ST, ensures that sweat doesn't build up, because clammy moisture will only make you that much colder when you start to descend. On the outside, the Ksyrium is made with a combination of windproof and water resistant nylon and polyester panels, which keep you warm in more moderate temperatures when you've removed the inner shell. A stretchy polyester insert ensures freedom of movement, while ergonomic seams follow the contours of your body to increase mobility and eliminate irritation. Zippered ClimaVent vents increase the jacket's breathability and cooling, while the locking asymmetrical zipper prevents chin irritation and lets you increase ventilation as needed. Mavic engineered the Ksyrium Pro Thermo Jacket with plenty of additional features to keep you warm, comfortable, and ...