Designed to integrate seamlessly with your helmet without sacrificing wall-to-wall vision, the M4 Toric Goggle will help keep your eyes on the prize. Toric lens technology mimics the curvature of the eye to provide superior optics and enhanced peripheral vision in an easily ventilated, fog-free package. And in addition to a magnetic frame that makes switching to your (included) bonus lens a breeze, Anon has also included a magnetic face mask to keep your chin warm.