Buy Lazer Bullet Helmet Link

: This unique sliding vent on the front allows you to manually switch between a fully closed aerodynamic shell for sprints and an open configuration for ventilation during climbs.

: The shell is compatible with Lazer's LifeBEAM heart rate monitor and an inclination sensor that alerts you if your head position is no longer aerodynamic. Considerations buy lazer bullet helmet

Lazer Bullet 2.0 Helmet - Cycling News | Bike Reviews - Road.cc : This unique sliding vent on the front