Smith Optics
Smith 4D MAG
$280
Best Ski Goggles · head-to-head
Smith 4D MAG vs Giro Contour
A sourced, side-by-side comparison. Giro Contour is cheaper at $200. Every spec and price links to its source.
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Giro
Giro Contour
$200Cheaper
Which is better: the Smith 4D MAG or Giro Contour?
On the specs we track, they're closely matched. The Giro Contour is the cheaper at $200.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Smith 4D MAG | Giro Contour |
|---|---|---|
| US price | $280 | $200 MSRP, single Vivid lens included |
| Brand | Smith Optics | Giro |
| Released | — | — |
| 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 |
Sources — Smith 4D MAG: smithoptics.com (verified 2026-08-11). Giro Contour: giro.com (verified 2026-08-11).
What's the difference between the Smith 4D MAG and Giro Contour?
Where the two actually differ on the specs we track (8 of 8). Matching specs are omitted.
- 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