P-09 Cycling Helmet Size:M (56-60cm) so they can be switched

so they can be switched if they wear out

Reflective tabs keep you visible to motorists in low light and Castelli calls for the optimal temps ranging from 59 to 86-degrees Fahrenheit

no-tool adjustable spline design integrated into lock body

Great choice for your road bike or indoor bike

P-09 Cycling Helmet Size:M (56-60cm) so they can be switchedThe P 09 helmet utilizes the innovative technology of the Vorttice helmet with improved aerodynamics, improved ventilation, and an improved lens system. The frontal surface is reduced to a minimum, making the helmet more compact. The inferior part of the tail is reversed for a better airflow at the shoulders, and a Speed Port allows air that enters at the front of the helmet to exit through vents behind the ears and release any pressure. A better vent