Yellowing aspens, orange oak trees, and leaves crunching under rolling tires are nature's way of reminding us that bib tights and thermal fabric weather is just around the corner. Instead of lamenting this change, embrace the frost-dappled scenery and train through the chill in Castelli's Women's Chic Bib Tights. Castelli constructs these bib tights from soft, warm, and stretchy Thermoflex fabric, which takes a starring role across Castelli's cold-weather line. Thermoflex's brushed, fleecy lining fends off the cold with cozy warmth and wicks moisture without irritating your skin. At the knees, Castelli uses and articulated shape and adds another layer of fabric for extra warmth and freedom of movement. The bib straps are made from light, breathable fabric, and the KISS Air chamois affords enough comfort for all your long-mile, winter training needs. The fit is snug and streamlined, making them ideal for both training and racing in cooler conditions, with minimal branding to avoid appearing overtly sponsor incorrect. Castelli recommends these bib tights for use between 41 and 59 degrees Fahrenheit, but you may find them useful in a wider range of temperatures depending on the day's planned intensity.