The Obex SPIN is where lightweight construction meets top-end safety. SPIN (Shearing Pad INside) technology has been used for added rotational impact protection. In-mould construction with an ABS top shell keeps the weight down and adds protection where needed most. Active venting allows airflow to be altered with ease and the size adjustment system provides a tailored fit.Size GuideSmallMedium/LargeX-Large51-54cm55-58cm59-62cmClick here for more information on our Size & Fit GuideVenting: ActiveSizing System: AdjustableWeight: 450gConstruction: HybridSafety standard: eN 1077 Class B, ASTM F 2040 Additional SafetyPOC\'s SPIN (Shearing Pad INside) technology uses silicone bladders within the liner which can move independently to the shell to reduce, and dissipate, the forces on the head created by rotational impacts.VentingPrecise and fully adjustable ventilation can be altered to meet individual needs and weather conditions. Sliding vent covers allow the user to open or close helmet ventilation whilst integrated vents at the front of the helmet allow air to flow through goggles, preventing fogging and keeping vision clear.Sizing SystemAn interior size-adjustment system allows the wearer to find an ideal fit by simply twisting the dial at the rear.ConstructionThe hybrid shell uses in-mould construction for maximum comfort while keeping weight to a minimum, and a robust ABS top shell for increased durability. The ePS liner provides shock absorption in the event of an impact.