Vertigo is designed for cyclists who demand innovation and performance produced using the innovative in moulding system the vertigo 20 incorporates the uplsquonrsquodown adjustment system that thanks to its unique double pivot design gives the most precise and comfortable fit of any helmet this enables the back of the head to be cradled by the straps which are then easily tightened to the correct tension by a central ratchet wheel this fitting system is combined together with highly br