The Anon M1 Goggle replacement lens is the undisputed master of the quick switch. Anon's Magna-Tech technology lets you pop out the lens and snap in a new one quickly and easily without smudging your lens. The M1 lens is also spherical for the maximum range of vision with zero distortion. A polarized version is also available to cut out glare. The dual-lens design reduces fogging, and the polycarbonate construction is tough to scratch or break.