Giro Avera Mips HelmetRedefined and reloaded, you'll appreciate the sleek aesthetic of the hidden EPS foam on the Women's Avera Mips helmet as well as the beveled detail on the venting slider, so it can be adjusted easily while wearing mittens or gloves. Specs Circumference 52 55. 5cm Construction In Mold Construction Ventilation Thermostat Control adjustable venting allows custom tuning of airflow instantly with a simple, low profile control button on the outside of the