Aerodynamics don't have to be uncomfortable. Look to the Casco SPEEDster Helmet With Visor for wind tunnel proven performance with cooling venting that is not going to allow your head to overheat on particularly hot days.
Closed sides and adaptive tear-off airflow edges keep turbulence over and around the helmet to a minimum no matter what position you are riding in.
Combined with the aero features of the helmet itself, the addition of Casco's SPEEDmask further enhances the SPEEDster's wind cheating credentials. The flip-up mechanism means the visor can be easily and quickly flipped up and down depending on whether you need it or not. The mask itself provides optical clarity and a full 180˚ field of view thanks to the premium Carbonic lens.
The welcome addition of insect guard mesh over the helmet's vents means you don't have to worry about a stray bee ruining your time trial effort. The fit is also comfortable with the Casco-Loc quick release. Adjustments to the fit can be made with the simple one-handed mechanism.
Adaptive aerodynamics: One of the many tear-off airflow edges on the rear ensures best aerodynamics, whatever the head position
CASCO-Loc: For quick opening with one hand and remarkably simple adjustment
Closed sides: Closed side pieces for uninterrupted air flow in the interior and exterior of the helmet (improved elimination of heat and prevention of turbulence)
Flip-Up SPEEDmask: Carbonic premium lens (rated to optical class 1) provides a full panoramic field of vision and world class clarity
Patented flip-up mechanism
SPEEDmask can be added or replaced at any time
Insect guard: Fits with glasses shape and promotes great air flow