I am selling a new, unworn aero cycling helmet. Size S 50-56 cm. Includes a bag, without the original box.

Manufacturer's description:
Aerodynamic performance, safety, and ventilation do not have to come at the expense of one another. Thanks to our whole-helmet approach to development, we have been able to achieve unparalleled levels of aerodynamic performance, safety, and ventilation in the Ventral Mips model without compromise.

Inspired by the Venturi effect, the helmet's airflow zones allow air to pass through more efficiently, resulting in a faster ride. Residual air traveling around the...