The M4 is the goggle the rest of the lineup descends from. It accepts toric or cylindrical lenses; toric for maximum peripheral vision, cylindrical for a wide, low-profile field of view, allowing you to prioritize performance or aesthetic. Magna-Tech (R) rare-earth N52 magnets and integrated grab tabs make lens swaps possible in seconds, mid-run, with gloves on. Two Perceive lenses ship in the box, delivering high-contrast terrain definition from full sun to low light. A paneled MFI (R) face mask is included and seals directly to the goggle frame. The M4 is the full package. Anon M4 MFI Goggles + Sunny Red Lens | Green | Christy Sports