The streamlined profile is achieved through the new Passive Aggressive Venting system, a discreet yet powerful system that automatically manages airflow and temperature while in-motion riding, hiking or standing static. The overall look is finished with a slight brim and subtle lines for Seamless Compatibility with Giro goggles. The Terra Mips ® Helmet also features Mips ® technology, lightweight construction and the dialed-in fit of the In Form 2 Fit system for a barely there feel. Features: Rotational motion can cause brain injuries; with MIPS, a low-friction layer slides 10 to 15 mm in all directions, reducing rotational motion to the brain during impact Inspired by the aerodynamic airflow of high-end autos, Passive Aggressive Venting effectively manages airflow and temperature while you're riding, hiking or standing still Stack Vent aligns with the center vent of your goggles to keep them fog-free; helmet is designed for seamless compatibility with Giro goggles (not included) On-the-fly vertical tuning accommodates different goggles and head shapes for a custom, gap-free fit In-mold construction fuses a tough polycarbonate outer shell with an impact-absorbing foam liner; fusion process allows for lighter helmets and better ventilation Easily dial in a custom fit—even with gloves on—with the lightweight, low-profile In Form 2 Fit System; improved dial enhances stability and offers up to 6 cm of adjustability Sleek design features a slight brim, removable goggles retainer and removable earpads Specs: Best Use Snowsports Helmet Style Snow Helmet Construction In-mold Shell Material Polycarbonate Head Circumference S: 20.5-21.85 inches M: 21.85-23.2 inches Visor/Brim No Weight Unavailable Gender Unisex Giro Terra Mips Women's Snow Helmet | Shop Ski & Snowboard Helmets at Trojan Wake Ski Snow & Snow Skiers Warehouse