Make sure you cover all conditions with spare lenses for your Clockwork goggle. The Clockwork uses our premium 2,8mm thick Toric sculped lens with our unique proprietary lens technology; RIG®. Developed by Sweet Protection to provide superior contrast, minimum color distortion and reduced eye fatigue. The double lens itself is equipped with a GORE® Protective Vent to equalize the pressure and avoid deformation of the inner lens due to variable atmospheric pressure – providing optimal working conditions for the eyes.