Castelli updates their Thermoflex Leg Warmers to make them even more comfortable for those cold weather rides, when shorts are too cold but tights too much. Our legs need to stay warm to pedal most effectively, and the brushed fleece of the Thermoflex 2 keep them insulated against the cold, while wicking sweat away from the skin to keep comfortable. An ankle zipper makes getting the warmers on and off far simpler without removing shoes, while the elastic thigh band keeps them firmly in place beneath our favorite bibs.