The Salomon S/LAB Phantasm 3 arrives with one of the most distinctive design concepts in the current super shoe market. Not only does it look fast, it attempts to redefine what race-day optimization means by integrating a gaiter system aimed at aerodynamic gains. At first glance, it is one of the most visually striking race shoes of the year. The question is whether the performance matches the ambition.
Upper and Fit of the Salomon S/LAB Phantasm 3
The defining feature of the S/LAB Phantasm 3 is its integrated gaiter system. Unlike fully enclosed spray-on constructions such as On’s LightSpray concept, Salomon combines a gaiter with a traditional lacing system underneath. The gaiter sits over an internal tongue structure, creating a hybrid system designed to optimise aerodynamics while maintaining adjustability. Putting the shoe on is fairly straightforward. It is not difficult, but it is also not as effortless as laceless systems. The lacing remains accessible, and adjustment is easy enough once the shoe is on. Laces can be tucked neatly inside the gaiter.
During the run, lockdown is solid. Importantly, the gaiter itself does not create the lockdown; that happens underneath via the lacing system and integrated tongue. The medial side integrates into the gaiter, while the lateral side behaves more like a traditional tongue construction. Fit runs long, which is consistent with Salomon’s historical pattern. In a true-to-size US 11 (EU 45 1/3), the shoe felt slightly longer than expected. It is not particularly narrow, which may surprise runners familiar with Salomon’s traditionally long-and-narrow fit profile. Here, the length is more noticeable than the width.
One notable observation is that the gaiter tends to collapse downward slightly during the run. It does not remain perfectly upright in its original shape.
What works for me
The lockdown underneath the gaiter is secure and effective. Once laced properly, the shoe holds the foot well without pressure points. The integration between tongue and upper is well executed, and overall comfort is good. The aesthetic execution is strong. The gaiter system gives the shoe a unique, performance-oriented appearance that clearly differentiates it from competitors. For athletes who value innovation and cutting-edge design, this is one of the most interesting uppers on the market. Fit, while slightly long, is otherwise comfortable and not overly restrictive.
What doesn’t work for me
The shoe runs noticeably long, which may require some runners to reconsider sizing. The gaiter system, despite its aerodynamic promise, did not deliver any perceptible performance benefit in testing. For most runners, the claimed aerodynamic advantages will likely remain theoretical rather than tangible. Additionally, the gaiter’s tendency to collapse downward during the run slightly undermines the premium execution of the concept.
Midsole and Ride of the Salmon S/LAB Phantasm 3
The midsole features Salomon’s OptiFoam+ compound, paired with a carbon plate. The foam feels like a blend but is actually supercritical PEBA. However, underfoot feel is where the experience becomes more complex.
What works for me
At very high speeds, the shoe begins to make sense. The platform feels stable, and the geometry is clearly tuned for aggressive pacing. At paces faster than approximately 3:15 per kilometre (around 17.5–18 km/h), the shoe feels more aligned with its intended purpose. The structure and firmness may benefit highly efficient, very fast runners who can consistently engage the plate and maintain high turnover.
What doesn’t work for me
The foam feels firm and relatively lifeless compared to the current industry standard. There is limited bounce and limited sense of dynamic energy return at moderate paces. The carbon plate is difficult to activate unless running at very fast speeds. For runners operating below elite-level paces, the shoe can feel rigid and somewhat unresponsive. Compared to leading race-day foams in the market today, the ride feels slightly dated or subdued. The overall sensation is dense and stiff, rather than explosive and lively. For a €280 shoe in 2025, expectations are high. And in its current state, the midsole does not feel fully competitive with the best-performing super shoes available.
Aerodynamics and Gaiter Concept of the Salomon S/LAB Phantasm 3
Does it work for all?
Salomon claims measurable aerodynamic gains, reportedly up to 18 seconds over a marathon for runners averaging 3:00 per kilometer pace. For athletes competing at that level, marginal gains may be meaningful. However, for the vast majority of runners, the aerodynamic benefits are likely negligible. They require optimal speed, conditions, and biomechanics to materialise. For most non-elite runners, the gaiter may function more as a conceptual innovation than a performance breakthrough.
Conclusion
First Impression Verdict and Value for Money
At €280, the S/LAB Phantasm 3 sits among the most premium options in the market. In this price bracket, it competes directly with shoes that deliver exceptional bounce, smoother transitions, and more accessible energy return. Based on initial impressions, the Phantasm 3 feels highly specialized. It appears built for very fast athletes who can fully activate its firm midsole and benefit from marginal aerodynamic improvements.
For the broader running population, there are alternatives at the same price point that offer a more universally enjoyable ride. This remains a first impression based on limited testing. Further outdoor mileage and longer efforts may reveal more depth to the midsole and overall performance. As it stands, the innovation is bold, the design is striking, but the ride does not yet fully justify the premium positioning.
