We spent 9.8 hours reading reviews from experts and users. In summary, this is what runners think:

9 reasons to buy

  • The shoe was very reliable in long-distance runs, according to an impressed user.
  • The Salomon S-Lab Sonic 2 offered consistent comfort both during and after races, an athlete commented.
  • The open mesh upper successfully kept the foot cool, said a runner.
  • A customer appreciated the midsole that was well-cushioned and responsive.
  • A reviewer liked how the shoe moved with the foot and made their gait effortless.
  • Many buyers thought the S-Lab Sonic 2 was a lightweight shoe.
  • The shoe’s contoured fit resulted in a balance of cushion, support, control, and spring, a runner stated.
  • There was excellent ankle support, mentioned a user.
  • The outsole delivered plenty of traction and durability, as written by a reviewer.

3 reasons not to buy

  • One wearer found the shoe to be narrow.
  • Some buyers thought the shoe was expensive.
  • The shoe did not provide a secure fit, considering it was made for racing, a reviewer pointed out.

Bottom line

The Salomon S-Lab Sonic 2 was able to amaze many of its users, as evident in their positive comments. The shoe’s various features, cushioning, and performance were all praised. There were some who encountered fit issues, but, overall, this neutral running shoe is a clear winner among consumers.



A top rated Road running shoe
It has never been more popular than this June
Better rated than the previous version Salomon S-Lab Sonic

Expert Reviews

91 / 100 based on 4 expert reviews

  • 98 / 100 | Road Trail Run | | Level 5 expert

    It's comfortable, roomy for a race shoe yet with a secure upper. It should be ideal for warm weather races and wet conditions. The response is outstanding. This shoe is ideal for "marathon pace" and somewhat faster running.

  • 92 / 100 | Gearist | | Level 5 expert

    Again, the Salomon S/Lab Sonic 2 is a fantastic shoe and I think that it does a wonderful job of balancing performance and comfort from both sides. While it is expensive, it could be the shoe that you find as good as I do and that may just be worth it.

  • 88 / 100 | Trail & Kale | | Level 4 expert

    ...these shoes are definitely worth giving a try. And if you already run in S-Lab trail shoes but need a similar feel and fit for training on the roads, the Sonic 2s will be the perfect transition, as you’ll already be used to the “S-Lab feel” that you probably love.

  • 80 / 100 | OutdoorGearLab | | Level 2 expert

    We are very impressed by the Sonic's fluid ride and secure fit, combined with their extreme light weight. The flexibility and protection given underfoot, which we've come to expect from a road shoe, was presented in this hybrid/cross-over running shoe.

  • First look | Shop Zappos |

  • First look | Running Warehouse | | Level 4 expert

Become an expert
  • The Salomon S-Lab Sonic 2 strives to be the athletes’ first choice for road-running, as it works doubly to bring speed, endurance, and performance all at once. The shoe’s features make it ideal for race day, as it enables the runner to move smoothly and naturally.
  • Although the upper still employs Sensifit overlays like the previous version, the S-Lab Sonic 2 displays an improved overlay pattern, one that appears thinner and minimal. The ankle collar has also changed, now lower yet broader compared to the first release.
  • The shoe retains the EnergyCell+ cushioning as it ensures ultimate performance even in longer runs. Meanwhile, the updated outsole now uses Premium Wet Traction Contagrip®, which offers an efficiently sticky grip, even on wet surfaces.

The Salomon S-Lab Sonic 2 is true to size, and runners will find an accurate fit with their regular size preference. The forefoot area of the shoe has a broad construction, allowing wearers to enjoy a natural toe splay. The S-Lab Sonic 2 is a unisex shoe and is available in men’s medium width.

Same as in the popular Salomon Sense Ride 2, the S-Lab Sonic 2 uses Premium Wet Traction Contagrip® in its outsole. This material is a durable rubber compound covering the length of the shoe, protecting the outsole against rough trails. Meanwhile, the high-wear areas have another layer of firmer rubber.

The outsole pattern employs the Geometric Decoupling system. With the square shapes close together, there is just the right amount of energy to enable a smooth stride. This feature means an easy touchdown and forward propulsion for the foot.

The Vibe technology in the midsole of the S-Lab Sonic 2 is the result of two cushioning structures fused together – the EnergyCell+ and the Opal. They work together to combat fatigue and promote a responsive ride.

The EnergyCell+ is a compression-molded ethylene-vinyl acetate (CMEVA) foam that has a high-rebound property. It aims to supply an exceptional energy return. Aside from that, it also equips the shoe with substantial cushioning.

Meanwhile, the Opal is a cushioning compound inside the midsole that provides a soft underfoot feel. It is lightweight, durable, and resistant to extreme temperatures.

The midsole’s framework comes in the form of 3D Profeel, a thermoplastic urethane (TPU) film that gives support. It adds protection without restricting ground sensation.

With a die-cut EVA sock liner, there is an added cushioning and comfort. The material is breathable as well.

The upper of the S-Lab Sonic 2 is a quick-drying double layer of mesh and nylon. It presents breathability, as well as abrasion resistance. Its internal lining is the Endofit™, a sleeve that hugs the foot for a glove-like fit. It moves with the foot, thus preventing chafing and irritation.

The brand’s proprietary Sensifit upper construction delivers a glove-like fit, capably gathering sufficient energy for forward propulsion that results in more miles.

There are two stretch panels on the medial and lateral sides of the forefoot, called 3D Flex. They relieve the pressure around the toes and forefoot, thus promoting a natural and comfortable run.

The shoe’s closure system is traditional lace-up, which encourages an easy and familiar way of adjusting the fit of the shoe.

Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.