What Our Gearhead Experts Are Saying:"I wore the A/C Bibshort on a hot, humid ride, and its breathability was unmatched. The mesh panels kept the airflow constant, and the Progetto X2 chamois offered all-day comfort even on rough roads. It's my go-to for summer training rides!"When summer temperatures soar, we reach for the Castelli A/C Bibshort to keep our cool on demanding rides. Designed with closed-knit mesh panels and a Progetto X2 Air Seamless chamois, this bibshort delivers premium breathability and comfort, ensuring we can push the pace without overheating. Every detail, from the minimalist mesh straps to the silicone leg grippers, is engineered to stay in place, move with us, and provide lightweight support during long hours in the saddle. Whether tackling hill repeats or enjoying a leisurely ride, this bibshort offers a cool, chafe-free experience under the sun.