<!--ProdInc[170058140]/Mall:[rei_US]--> Rotational motion can cause brain injuries; with MIPS, a low-friction layer slides 10 to 15mm in all directions, reducing rotational motion to the brain during impact Aerocore hybrid ABS and in-mold construction offers ventilated protection featuring patented Koroyd material, integrated skeletal structure and Aramid filament reinforcement Koroyd is an open-cell protective material that absorbs more energy on impact than traditional helmets while also increasing airflow Women-specific XT2 antibacterial performance lining and snap-in SL2 earpads add comfort and warmth AirEvac ventilation offers adjustable climate control via 20 vents; can be adjusted even while wearing gloves VaporFit dial offers 5cm of rotary adjustment for a personalized, secure fit; additionally, the system can be moved up/down or forward/backward at the attachment points Helmet is designed to match goggles-frame curvature, eliminating the gap and allowing alignment between AirEvac and goggles venting to vent warm, moist air away from goggles Beanie-compatible design; removable goggles lock Compatible with Aleck, Outdoor Tech and Skullcandy audio systems (not included) Certifications: ASTM F 2040 and CE EN 1077:2007 Class BImported.