In the realm of cycling, there isn't another season where deliberate apparel choices are more important than in the winter months. Balancing the seemingly contrasting demands of warmth and breathability is especially challenging when the temperatures dip below freezing, but the Castelli Elemento 7xAir jacket accomplishes this task admirably. By blending air permeable 7xAir fabric with panels of the windproof WindShear material, Castelli has achieved an optimum balance of protection and ventilation. And with the stretch fabric panels, the Elemento achieves a degree of comfort that's rarely seen in jackets with such a slim fit. Your winter training rides just got considerably more comfortable. Arguably, the most intriguing storyline with the Elemento jacket is its blend of fabrics. After all, without thoughtful venting and remarkable stretch, achieving this degree of comfort with the race fit simply wouldn't be possible. The 7xAir portion of the name belies the 7xAir fabric, which of course, is a Castelli exclusive. It's so named because it's seven times more air permeable than the WindStopper fabric that's found in Castelli's other cold weather jackets, yet just as warm. Accordingly, it's employed in about 50% of the jacket, in areas that require the greatest degree of heat evacuation, like the underarms. The rest of the jacket, specifically the chest and back panels, are built from Castelli's WindShear material. Both materials are built to stretch, enabling a slim, flap free fit. As previously mentioned, the Elemento's slim fit is noteworthy, not only for its aerodynamic properties, but for its insulation and comfort as well. Obviously, minimizing any unneeded material in the pursuit of a quiet ride pays dividends when turning every last watt of your energy into forward momentum. But, by reducing bulk, the amount of dead space in between your core and the jacket is minimized, which allows your body to efficiently retain heat. And since the cut is backed...