Chances are, you don't have a 'special' helmet for the winter. Instead, you're trapped in the cold by the helmet's best summertime feature its ventilation. To free yourself from this conundrum, we suggest the Capo Thermo Roubaix Skull Cap. It's thin enough to fit under your helmet, but strong enough to stave off the chills of cold wintertime riding. Capo selected the ultra warming and heavy wicking Thermo Roubaix fabric. With a warp knit construction, the material is given a natural stretch. Within the knit, the threads follow a zig zag pattern along the length of the pattern. This allows more surface area coverage while using less material, equating directly to an airy, lightweight construction. Thermo Roubaix's open weave also accelerates moisture transfer from the skin to the quick drying surface of the cap, however, the fabric's precise brushing process is what's attributable to its warmth. The brushed inner lining provides a high, fleecy, and warming loft. The shape of the Skull Cap is minimally seamed in order to reduce the possibility of abrasion. The thin construction fits easily under any helmet, and the head band is cut low enough to cover the entirety of your ears. The Capo Thermo Roubaix Skull Cap is available in one size and in the colors Black, Red, and White. Every cap is made in Italy, and is most effective in temperatures ranging between 40 and 50 degrees Fahrenheit.