EVO2 Safety Helmet with Slip Ratchet 

The EVO2 Comfort Plus helmet combines a super-strong shell for superior all-day protection in the widest range of environments, with the comfort benefits of the new Evolution 3D Adjustment harness system. Packed full of the latest protection technology and features such as the Evolution 3D Adjustment harness system, Revolution Wheel Ratchet or the unique OneTouch Slip Ratchet, which can be adjusted using one hand in a single swift movement.