Kask Protone Limited Edition Helmet

Developed in collaboration with team sky, the Kask protone road helmet is super-lightweight, highly ventilated and aerodynamic, plus its skull-hugging, low-profile design feels like it was specially Fitted for your head. It’s been wind-tunnel tested to maintain streamlined performance and ventilation in virtually any riding position; even if you move your head, it’ll remain consistent. It’s also been designed using computational fluid dynamics software to attain one of the lowest drag coefficients of any ventilated helmet.
Wind tunnel tested – the protone boasts the lowest drag co-efficient of any ventilated helmet available
All about fit – Kask octofit adjustment system guarantees a perfect fit
Lightweight comfort – weighs just 230G and uses 3D Dry padding and eco-leather Chinstrap
Safety first – meet and exceed all US safety standards for bicycle helmets