The women’s Liberty offers top-end technology and features for those seeking the best. Smith’s VaporFit system provides easy and effective size adjustment while MIPS reduces the rotational effects of an oblique impact to the head. Hybrid construction combines a tough wearing hard shell in critical areas of the helmet, with a lightweight in-mould build to reduce the overall weight. Aerocore uses Koroyd for impressive air circulation and exceptional energy-absorbing properties. Active venting allows airflow to be controlled for different weather conditions at the slide of a button.Size GuideSmallMedium51-55cm55-59cmClick here for more information on our Size & Fit GuideVenting: ActiveSizing System: AdjustableWeight: 500gConstruction: HybridSafety standard: EN 1077 Class B, ASTM F 2040 Additional SafetyWhen you fall to the ground at an angle rotational forces are generated. A helmet integrating MIPS technology creates a sliding layer between the outer shell and the head. This allows the helmet\'s outer shell to slide relative to the head when hitting the ground, so the rotational force is decreased, reducing the potential to damage your brain.Smith Aerocore construction features Koroyd which was developed for the aerospace industry and provides superior impact absorption and ventilation compared to traditional helmet materials. The crumple-zone cylinders crush uniformly on impact absorbing energy whilst reducing the overall weight of the helmet. VentingDual Regulator ventilation system independently controls the front and rear sections of the helmet vents, allowing you to modulate your body temperature even in extremely cold conditions. By exhausting heat through the rear vents while maintaining a sealed front end, your body can effectively cool down if needed and avoid the dreaded “ice cream headache.”AirEvac Ventilation allows goggles and helmets to function as one system, venting warm moist air away from the goggles, through the helmet climate control system and ultimately away from the head. Sizing SystemCrafted with ease-of-use and superior comfort in mind, the VaporFit system relies on a tried and tested rotary dial adjustment system integrated with a tuned elastic fit using engineered shapes. Each VaporFit system has a full 5cm of rotary adjustability. Additionally, the system can be moved up/down or forward/backward at the attachment points. The result is increased comfort with a personalised, secure fit.ConstructionSmith’s hybrid shell combines in-mould and hard shell construction to get the best of both builds. By fusing tough bombshell ABS with flyweight in-mould technology, hybrid shell construction optimises the favourable traits of each material. The result is a modern design that provides a lightweight, low profile helmet.