Salomon S-Lab Sonic 2

8.8
8.8 score
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Salomon S-Lab Sonic 2 Review Facts

Salomon has made their mark on trail running.  Since entering the fast growing field of trail running, they have designed some of the best trail shoes in the world and sponsor a collection of the best endurance athletes. Recently they have decided to see how their trail shoe technologies translate into road running – first with the Salomon S-Lab X-Series, then with the S-Lab Sonic and now with the S-Lab Sonic 2. For the most part, the Sonic 2 keeps the same great original design but makes some interesting changes to the outsole and midsole design. Salomon is always looking for ways to improve an already superior product.

Pros
  • The durable Contagrip outsole provides good traction on wet, slippery surfaces.
  • ProFeel Film protects the midfoot area while giving this shoe a fast, responsive ride.
  •  As with other shoes in the S-Lab series, it is lightweight and responsive.
  • Toe box is nice and roomy, giving runners enough room to splay their toes.
  • Flexibility throughout the shoe is great for speed and is well suited to runners who value a strong toe off and have excellent foot strength.
Cons
  • Expensive
Outsole
Outsole

Outsole

Salomon made a few changes in the design of the outsole for this new edition of the S-Lab Sonic. The earlier design had a large gap in the midfoot area where the ProFeel Film was exposed. In this edition, the Pro-Feel film is still exposed, but it is level with the Contagrip outsole. The ProFeel Film and Contagrip provide runners with nice traction on wet and slippery surfaces. It also offers protection throughout the midfoot while retaining a responsive ride throughout. The design of the outsole also makes for a very flexible shoe, which is perfect for runners with good foot strength and looking for a little more freedom in their stride, as well as a strong toe off.
Midsole
Midsole

Midsole

The midsole is a combination of EnergyCell technology, Opal and EVA cushioning. The Energy Cell is great at providing a responsive feeling and some shock absorption. Opal is a lightweight cushioning that is great at dissipating shock, giving you a comfortable ride while also retaining the shoe’s nice snappy feeling. There is a bit of EVA cushioning in the midsole as well. The Sonic 2 also features Salomon’s Vibe technology, which works with the cushioning to provide extra shock absorption and more responsiveness. All together, this is a nice lightweight midsole with sufficient cushioning and great shock absorbing qualities.
Upper
Upper

Upper

This shoe still offers the great open mesh upper that allows for air to pass throughout the shoe, which is great for cooling the foot and keeping you comfortable in hot climates or on race day. The upper uses synthetic material and the SensiFit design to lock the midfoot in while giving the toes some wiggle room. The EndoFit is like a sock liner that fits snuggly around the foot, giving the shoe a a locked in fit. This shoe also uses 3D Flex around the medial and lateral sides of the foot to help hug the foot, but also expand on long runs in order to keep your foot comfortable.
Weight
Weight

Weight

The shoe weighs in at 7.6 oz for both men and women. Compared to the previous version, Salomon designers were able to shave off a minuscule amount of weight. This is a lightweight shoe, but not as lightweight as some racing flats. Considering all of the technologies that were incorporated into the shoe, it's still very lightweight. Because of the stickiness of the Contigrip outsole some runners even use this as a light trail running shoe and as such, this would be considered a very light trail shoe.
Breathability
Breathability

Breathability

The open mesh upper is great for keeping your feet cool, and was specifically designed for keeping feet cool on race day, intense training or hot weather conditions. Although you can see through the mesh, it is durable enough to protect your foot. This also makes for a very fast drying shoe in the event your feet wet.
Comfort
Comfort

Comfort

This shoe is the perfect balance of cushion and responsiveness, primarily due to the combination of the midsole materials. The Energy Cell, Opal and limited EVA material is great for shock attenuation while giving good energy feedback. The inner lining of this shoe is also nice and comfortable next to foot. The SensiFit and EndoFit do a great job of giving this shoe a good midfoot fit while still providing sufficient room in the forefoot for toes to naturally splay.
Style
Style

Style

This shoe comes in one style for men and women, which is typical for shoes in the S-Lab line. It’s a performance shoe that has a low stack height and looks fast. The red color is bold and is also typical of Salomon’s S-Lab series. This shoe is all red with darker red lettering showing the brand and model, perfect for going with Salomon’s other S-Lab gear such as their hydration packs or S-Lab clothing line.
Durability
Durability

Durability

The extra weight makes this road shoe durable. The Contagrip material makes for an excellent outsole that is highly durable whether you use it on the road or even on light trails. The midsole material is also highly durable, giving a nice cushioned ride even after several hundred miles.
Protection
Protection

Protection

The ProFeel Film does a good job of protecting the midfoot area while providing shock attenuation and excellent ground feel. There is a bumper area around the toe box, good for light trail and protecting the forefoot area. The tongue is lightly padded for some top of foot protection. The 3 types of midsole material are great at protecting runners from overuse and impact related injuries.
Responsiveness
Responsiveness

Responsiveness

This shoe is the perfect balance of cushion and responsiveness. The midsole material technologies work well together to give good energy rebound, ground feel and cushion. This responsive performance shoe is good for runners with a quick turnover and an efficient stride. The responsiveness and cushion might even make this a good shoe for runners trying to improve their turnover.
Support
Support

Support

There isn’t a ton of support in racing shoes in general, since they are built for elite athletes who already have good form. However, it is very low to the ground, good for supporting an already neutral stride. The SensiFit and EndoFit technologies work well at locking the foot in while allowing it to move in a natural motion.
Terrain
Terrain

Terrain

The smooth outsole design automatically indicates that this shoe is meant for the road. However, thanks to the highly sticky, soft rubber outsole, this shoe can easily tackle hard packed or light trail. This shoe also provides good traction on wet surfaces.
Price
Price

Price

Priced at $170 USD, this is an expensive shoe, but you will get many durable, high performance miles from it. For a highly durable shoe that is comfortable, light and can be used on roads or light trail, this is a reasonable price.
Traction
Traction

Traction

The Contagrip outsole is good at providing traction on wet, slippery, smooth surfaces and is great for pavement, smooth stones or packed trail. The flexibility of this shoe adds to the traction, as it bends with the foot, allowing it to adapt to a variety of surfaces. This type of traction is good for providing a strong toe off and some nice grip.
Flexibility
Flexibility

Flexibility

This shoe is flexible in all areas of the shoe. The upper's flexibility comes from the 3D Flex technology. It wraps around your foot and moves with it, making it an excellent shoe for runners with excellent foot strength and an efficient stride.
Stability
Stability

Stability

The Salomon S-Lab line is designed for elite athletes and as such, they are all designed for neutral runners with an efficient stride. The S-Lab Sonic 2 is no exception. This is a shoe that works with your foot and natural running ability and gives you the freedom to run as you like while providing you the protection, grip and cushion. It is ideal for long distance running. Being that it’s low to the ground, it provides a lot of response and feedback without altering your stride.
Drop
Drop

Drop

There is an 8mm drop which for some might be a little high for a performance road shoe. But because Salomon did such a great job at designing this shoe, it doesn’t feel like you are dragging your heels. This offset also allows for a little extra cushioning in the heel. If you are a heel striker, the combination of the different midsole materials do a great job of getting you off your heel and on to your toes.
Key Features of the S-Lab Sonic 2
Key Features of the S-Lab Sonic 2

Key Features of the S-Lab Sonic 2

• ProFeel Film
• Vibe Technology, which is a combination of Opal and Energy cell technology in the midsole
• Geometric decoupling design
• SensiFit and EndoFit technologies
• Moisture wicking nylon lining
• Contagrip rubber outsole
• Lightweight open mesh upper
• 3D Flex technology
Bottom Line
Bottom Line

Bottom Line

This is a great half marathon, full marathon or ultra marathon shoe. It has some really nice shock absorbing qualities that are great for long road runs. It also has the Contagrip outsole, so that it provides good traction on road, wet surfaces and even light trail. Some runners might be turned off my the price tag, but for the amount of high quality, performance miles you can get from the shoe, it is well worth the price. In this new edition, designers really focused on achieving a cushioned shoe with a responsive snappy feeling, and they succeeded.