If certified protection at a great value isnt reason enough this feature rich design also includes the headset sx dial fit system for easy adjustment and a perfect fitone size system designed for easy and accurate fit to a wide range of head sizesheadset sx fit system with micro adjustable dial for easy secure and accurate fittri fix web splitter for improved comfort and ease of strap adjustmentsreflective webbing for added visibility4th dimension cooling system to optimise ventilationin m