How do I prevent my goggles from fogging with a half-shell helmet?

First, ensure there's no gaper gap — your goggles should sit flush against the helmet with no exposed skin. Second, use the helmet's adjustable vents: open the top vents to let warm, moist air escape before it hits your goggle lens. Third, never put wet goggles on a warm forehead — the temperature difference causes instant fogging. Fourth, make sure your goggle lenses are clean and treated with anti-fog coating. Finally, avoid overdressing — if your body is too warm, your head will sweat more, increasing fogging.