# Smith 4D MAG vs Julbo Aerospace: specs and price compared

A sourced, side-by-side comparison of the Smith 4D MAG (Smith Optics) and Julbo Aerospace (Julbo) among ski goggles. Smith 4D MAG is the cheaper of the two at $280.

## Side by side

| Spec | Smith 4D MAG | Julbo Aerospace |
| --- | --- | --- |
| US price | $280 | $290 |
| Brand | Smith Optics | Julbo |
| Lens vlt (%) | ChromaPop Sun Black, 10% (ChromaPop Storm Rose Flash 28% and ChromaPop Everyday Green Mirror 23% also offered) | REACTIV 1-3 photochromic, VLT range ~11-42% |
| Lens geometry (cylindrical/spherical/toric) | Spherical outer lens over a toric BirdCage 2.0 inner frame for expanded peripheral vision | Cylindrical |
| Lens interchange system | Smith MAG magnetic quick-release lens system | No quick-change system — fixed single lens |
| Anti-fog coating/venting | Smith Fog-X inner-lens anti-fog coating with AirEvac brow venting | Julbo SuperFlow system — lens can be pushed outward from the frame for boosted airflow, plus anti-fog lens coating |
| Photochromic option | Yes — ChromaPop Photochromic Rose Flash lens option, VLT ~25-50% | Yes — REACTIV photochromic lens is standard on this model |
| Frame size fit | Large — fits medium-large faces; Low Bridge Fit version also sold | Medium-Large |
| Helmet compatibility | Yes — integrates with Smith helmets | Yes |
| Otg (over-glasses) fit | No — dedicated OTG fit not offered on 4D MAG | No |

## 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 Julbo Aerospace REACTIV 1-3 photochromic, VLT range ~11-42%
- Lens geometry (cylindrical/spherical/toric): Smith 4D MAG Spherical outer lens over a toric BirdCage 2.0 inner frame for expanded peripheral vision vs Julbo Aerospace Cylindrical
- Lens interchange system: Smith 4D MAG Smith MAG magnetic quick-release lens system vs Julbo Aerospace No quick-change system — fixed single lens
- Anti-fog coating/venting: Smith 4D MAG Smith Fog-X inner-lens anti-fog coating with AirEvac brow venting vs Julbo Aerospace Julbo SuperFlow system — lens can be pushed outward from the frame for boosted airflow, plus anti-fog lens coating
- Photochromic option: Smith 4D MAG Yes — ChromaPop Photochromic Rose Flash lens option, VLT ~25-50% vs Julbo Aerospace Yes — REACTIV photochromic lens is standard on this model
- Frame size fit: Smith 4D MAG Large — fits medium-large faces; Low Bridge Fit version also sold vs Julbo Aerospace Medium-Large
- Helmet compatibility: Smith 4D MAG Yes — integrates with Smith helmets vs Julbo Aerospace Yes
- Otg (over-glasses) fit: Smith 4D MAG No — dedicated OTG fit not offered on 4D MAG vs Julbo Aerospace No

## Sources

- Smith 4D MAG: https://www.smithoptics.com/en-us/4d-mag-snow-goggle/ (smithoptics.com, verified 2026-08-11)
- Julbo Aerospace: https://www.julbo.com/en-us/aerospace-goggle (julbo.com, verified 2026-08-11)

Canonical: https://frontdeskreview.com/gear/ski-goggles/smith-4d-mag-vs-julbo-aerospace/
Cite: Per The Front Desk Review, Smith 4D MAG ($280) vs Julbo Aerospace ($290) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/ski-goggles/smith-4d-mag-vs-julbo-aerospace/
License: CC BY 4.0.