The Bullet helmet provides an answer to the age-old dilemma of ventilation versus aerodynamics, in addition this one has added MIPS an industry leading safety technologyThe MIPS patent was developed by some of the world's leading researchers in biomechanics and neuroscienceMIPS is setting a new standard for helmet safetyThe secret behind MIPS patent comes from the study of the human brainThe brain is surrounded by a low-friction cushion of cerebrospinal fluidMIPS imitates the brain's way of protecting itself by giving the helmet its own low-friction layer between the outer shell and the linerIn the event of a crash this layer absorbs much of the energy created by a blow to the headThe combination of the brain's own protection and MIPS enables maximum protection for the riderWith its narrow shape and closed shell it is a seriously aerodynamic helmet but a quick adjustment to the Airslide system turns it into a helmet with sufficient ventilation to tackle climbs on hot daysWith four available sizes, the Bullet helmet will provide you with a snug fit and a helmet that is well fitting. This in turn creates a narrow shape with a small frontal area, creating the drop like shape of the helmetIn combination with the closed shell, this creates the aerodynamic performance to make the Bullet into a sprint helmetWhen ventilation is required, the Airslide system can be utilized to open up the front of the helmet and create an airflow throughout with exhaust vents at the rearWhen ventilation is of lesser importance, the entire Airslide system can be exchanged for a fully closed cap, creating an even more aerodynamic version of the helmetFast like a bullet, it's the perfect combination of aerodynamics and ventilation, whenever you need it!