# Smith 4D MAG vs Giro Contour: specs and price compared

A sourced, side-by-side comparison of the Smith 4D MAG (Smith Optics) and Giro Contour (Giro) among ski goggles. Giro Contour is the cheaper of the two at $200.

## Side by side

| Spec | Smith 4D MAG | Giro Contour |
| --- | --- | --- |
| US price | $280 | $200 |
| Brand | Smith Optics | Giro |
| Lens vlt (%) | ChromaPop Sun Black, 10% (ChromaPop Storm Rose Flash 28% and ChromaPop Everyday Green Mirror 23% also offered) | Vivid Copper, 24% (Vivid Infrared 24%, Vivid Onyx 13%, and clear/low-light Vivid tints up to 73% also offered) |
| Lens geometry (cylindrical/spherical/toric) | Spherical outer lens over a toric BirdCage 2.0 inner frame for expanded peripheral vision | Spherical, EXV (Expansion View) cylindrical peripheral fit |
| Lens interchange system | Smith MAG magnetic quick-release lens system | Toolless interlocking lens-change system (non-magnetic) |
| Anti-fog coating/venting | Smith Fog-X inner-lens anti-fog coating with AirEvac brow venting | Dual-pane lens with anti-fog coating and micro-porous foam venting |
| Photochromic option | Yes — ChromaPop Photochromic Rose Flash lens option, VLT ~25-50% | No standard photochromic lens offered |
| Frame size fit | Large — fits medium-large faces; Low Bridge Fit version also sold | Medium-Large, built with extra foam depth for glasses clearance |
| Helmet compatibility | Yes — integrates with Smith helmets | Yes |
| Otg (over-glasses) fit | No — dedicated OTG fit not offered on 4D MAG | Yes — deep foam profile designed to fit over prescription glasses |

## Key differences

- Lens vlt (%): Smith 4D MAG ChromaPop Sun Black, 10% (ChromaPop Storm Rose Flash 28% and ChromaPop Everyday Green Mirror 23% also offered) vs Giro Contour Vivid Copper, 24% (Vivid Infrared 24%, Vivid Onyx 13%, and clear/low-light Vivid tints up to 73% also offered)
- Lens geometry (cylindrical/spherical/toric): Smith 4D MAG Spherical outer lens over a toric BirdCage 2.0 inner frame for expanded peripheral vision vs Giro Contour Spherical, EXV (Expansion View) cylindrical peripheral fit
- Lens interchange system: Smith 4D MAG Smith MAG magnetic quick-release lens system vs Giro Contour Toolless interlocking lens-change system (non-magnetic)
- Anti-fog coating/venting: Smith 4D MAG Smith Fog-X inner-lens anti-fog coating with AirEvac brow venting vs Giro Contour Dual-pane lens with anti-fog coating and micro-porous foam venting
- Photochromic option: Smith 4D MAG Yes — ChromaPop Photochromic Rose Flash lens option, VLT ~25-50% vs Giro Contour No standard photochromic lens offered
- Frame size fit: Smith 4D MAG Large — fits medium-large faces; Low Bridge Fit version also sold vs Giro Contour Medium-Large, built with extra foam depth for glasses clearance
- Helmet compatibility: Smith 4D MAG Yes — integrates with Smith helmets vs Giro Contour Yes
- Otg (over-glasses) fit: Smith 4D MAG No — dedicated OTG fit not offered on 4D MAG vs Giro Contour Yes — deep foam profile designed to fit over prescription glasses

## Sources

- Smith 4D MAG: https://www.smithoptics.com/en-us/4d-mag-snow-goggle/ (smithoptics.com, verified 2026-08-11)
- Giro Contour: https://www.giro.com/en-us/contour (giro.com, verified 2026-08-11)

Canonical: https://frontdeskreview.com/gear/ski-goggles/smith-4d-mag-vs-giro-contour/
Cite: Per The Front Desk Review, Smith 4D MAG ($280) vs Giro Contour ($200) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/ski-goggles/smith-4d-mag-vs-giro-contour/
License: CC BY 4.0.