The Anon Sync Goggles feature M-Fusion lens change technology with a magnetic latch system for fast and easy lens changes. The cylindrical lens offers a wide field of view, while PERCEIVE lens technology enhances contrast for the best possible definition and terrain recognition. Full-perimeter vents ensure maximum airflow for clear, fog-free vision in all conditions. A no-slip silicone strap keeps the goggles locked in place on your helmet. They are over the glass compatible and include a spare lens for cloudy conditions plus a microfiber bag for storage and lens cleaning.