Salomon has given its S/Lab Pulsar a thorough overhaul for 2026, and the fourth iteration arrives as one of the more intriguing race-day options for runners who spend their weekends on steep, technical terrain. Priced at 220 dollars and aimed squarely at the short-to-middle-distance mountain racer, the Pulsar 4 is less a do-everything trainer than a precision instrument designed for days when grip, agility and a low, connected feel matter more than plush cushioning.
The redesign is comprehensive. Salomon has raised the stack height, reworked the foams and fitted a more structured upper, while keeping the silhouette featherlight at a touch over a pound for the pair. Recent lab measurements put the shoe at around 94.9mm at its widest point and 74.0mm in the toebox, figures that suggest a slightly more accommodating last than Salomon's typically narrow fit, even if the brand's racing shoes still run snug by design.
On the trail, the Pulsar 4 feels most at home where the gradient turns severe. Reviewers single out steep and technical descents as the shoe's natural habitat, with the nimble fit and secure traction combining to inspire confidence over rock, root and loose ground. It is the kind of shoe that rewards an aggressive, committed running style, hugging the foot closely so that quick changes of direction translate cleanly into grip and control.
There are trade-offs. Lab testing found the energy return surprisingly modest for a shoe at this price, and the overall ride leans more cushioned than genuinely energetic, so runners hoping for a propulsive, springy sensation may be left wanting. The fit, while broadened a little, remains narrow with no wide option, which will rule the Pulsar 4 out for some feet regardless of its handling on the descents.
The verdict, then, is one of clear purpose. The S/Lab Pulsar 4 is a specialist's race shoe, best suited to short and middle-distance skyraces and technical courses where security and agility outweigh long-haul comfort. Runners after a max-cushion ultra trainer should look elsewhere, but for those chasing a fast, sure-footed feel on demanding terrain, Salomon's latest racer makes a compelling, if pricey, case.