Say hi to the all-new Specialized Propero 4 helmet that 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 the equation for speed in mind. Aerodynamics + Ventilation + Lightweight = Fast.

With extensive testing in CFD and in a Win Tunnel, aerodynamics were at the forefront of the Propero 4 development. Spec took the aerodynamic leading edge from the S-Works Evade 3 and pulled it directly into the Propero 4 - which helped it to be four watts, or 15 seconds over 40km, faster than their S-Works Prevail 3.

Drawing inspiration from their world-renowned S-Works Prevail 3 venitlation, Spec's goal was not merely to replicate but to elevate. Ventilation became a focal point in thier quest for a well-balanced, aerodynamic, and ventilated helmet. They incorporated the rear-end design language of the S-Works Prevail 3 and introduced small 2mm offset micro-channels that create turbulence in the airflow throughout the helmet to help create a continuous, refreshing flow of air.

Beyond just aerodynamics and ventilation, the Propero 4 helmet represents meticulous attention to detail. Spec went the extra mile by incorporating cutting-edge technologies from their S-Works level helmets, like MIPS technology for confidence and more safety, and a FS3 fit system and Occipital Base Adjustment designed to deliver all-day comfort. The Propero 4 doesn't just meet expectations, but exceedes them.

Features:

• Precision, full-wrap polycarbonate shell for increased durability and premium finish
• S-Works Evade 3 front-end design language for enhanced Aerodynamics.
• Mips Evolve Solution is a low-friction layer that allows a sliding motion of 10 to 15mm in all directions. Studies indicate that this reduces some of the rotational forces transmitted to the brain during angled impacts.
• Micro Channeling & large rear-end vents for increased ventilation
• The highest 5-Star Virginia Tech® Helmet Rating from 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 glasses.
• Adjustable Tri-Fix web splitter combined with thin 10mm webbing for increased comfort.
• Dedicated sunglass storage maintains a secure fit and keeps eyewear out of the way when needed.
• Weight: 290g (size M)
• Sizes: S (51-56 cm), M (55-59 cm), L (59-63cm)

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