Meet the all-new Propero 4 helmetit brings the aero advantages of the S-Works Evade 3 together with the ventilation of S Works Prevail 3, all with the comfort and confidence Specialized helmets are famous for, earning the highest 5-Star Virginia Tech® helmet rating. Every detail of the Propero 4 was created with our equation for speed in mind. Aerodynamics + Ventilation + Lightweight = Fast.Key Features:Mips C-SolutionPropero 4 earned the highest 5-Star Virginia Tech® Helmet Ratingfrom internationally renowned Virginia Polytechnic Institute and State University.FS3 Fit System & Occipital Base Adjustment optimizes comfort by personalizing fit to individual head shape, and helmet angle can be adjusted for compatibility with glassesAdjustable Tri-Fix web system for added comfortSunglass storageThin 10mm webbing for increased comfortMicro Channeling & large rear-end vents for increased ventilationS-Works Evade 3 front-end design language for enhanced AerodynamicsPrecision, full-wrap pol