Castelli revamped its revolutionary Free Aero Bib Shorts for 2015, making them even more breathable, aerodynamic, and supportive than the previous model and introducing a women specific bib short option to the line. These bib shorts are comfy enough for a local century, with technology built to handle the toughest races or training days. The Free Aeros are made of a blend of fabrics designed for durability and cool breathability, mixed with Lycra for a perfect balance between supportive compression and unrestricted movement. The sides and back also have surface dimpling similar to a golf ball meant to cut through the wind and get you down the road faster. To complete the fit, Castelli's wide Giro Air leg bands feature a thin, mesh like gripping surface to keep everything in place and eliminate any uncomfortable bunching or pinching just remember to throw on some sunscreen under the leg bands to avoid getting burnt. Castelli rounds out the Free Aero Bib Shorts with the women specific Progetto X2 Air Donna, an antimicrobial chamois with seamless construction, four way stretch, and a perforated foam layer for a soft, ventilated, friction free ride.