The Anon M2 Goggles feature Magna-Tech® quick lens-change technology, using powerful magnets to make lens changes easier than ever. A spherical lens mimics the curvature of the human eye for precise optics, while PERCEIVE lens technology enhances contrast for the best possible definition and terrain recognition. Lens Perceive Variable Green (22% / S2), Spare Lens: Perceive Cloudy Pink (53% / S1)