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. Perceive Variable Green (22% / S2), Spare Lens: Perceive Cloudy Pink (53% / S1)