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Introducing the Specialized Propero 4a helmet thats designed to bring the aero advantages of the S-Works Evade 3 together with the ventilation of S-Works Prevail 3 and it does it all with the comfort and confidence Specialized helmets are famous for earning the highest 5-Star Virginia Tech helmet rating from internationally renowned Virginia Polytechnic Institute and State University. Every detail of the Propero 4 was created with our equation for speed in mind. Aerodynamics + Ventilation + Lightweight Fast.
- Shell Material: polycarbonate.
- Impact Management: Mips C-Solution.
- Ventilation: micro channeling large rear-end vents.
- Fit Adjustment: FS3 Fit System and Occipital Base Adjustment.
- CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older.