Specialized Propero 4 Bike Helmet bikepublish the ultimate fusion of warmth

the ultimate fusion of warmth and versatility for mountain enthusiasts

and if you to keep your transitions crazy simple

Polartec Alfa synthetic insulation

The specially designed e-bike is comfortable to ride in town or on dirt roads

Thermal Management: Passive Cooling

Specialized Propero 4 Bike Helmet bikepublish the ultimate fusion of warmthMeet the all new Propero 4 helmet. This helmet combines the aero advantages of the S Works Evade 3 with the ventilation of the S Works Prevail 3, all with the comfort and confidence Specialized helmets are famous for. It earned 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. AERODYNAMICS: With extensive testing in CFD and in