Updates

- The Adidas Adizero Boston 9 is an update to a well-known series of racing shoes that began their lives as dazzlers of the famed Boston Marathon. This model heightens breathability via visible breathing holes patterned throughout the mesh upper. A thin tongue construction and a general reduction of bulk and stitching shave off weight.

When it comes to the midsole, the fresh-from-the-press Lightstrike foam is used with the tried-and-true Boost™ cushioning unit to deliver reactive and comfortable performances. Car tire-optimized rubber protects against abrasion while also providing grip over the ground.

Size and fit

Standard sizing schemes were used when the Adidas Adizero Boston 9 was made. Runners are welcome to use their usual choices of size when it comes to making a purchase decision. Still, it could be beneficial to test it personally or study user reviews that talk about the quality of the sizing aspect to fully enjoy an in-shoe feel that is accommodating and agreeable.

The sideways fit is influenced by the semi-curved shape of the platform, the form-welcoming nature of the upper, and the uncluttered nature of the overall design. The natural outline of the human foot is the basis of the look of this product.

Outsole

Continental™ is the material that is used for the external pad of the Adidas Adizero Boston 9, and its job is to protect the bottom portion of the midsole unit from the abrasive nature of the surface. It is also tasked with doling out traction for the runner to enjoy throughout the activity. Continental™ is a car tire-grade feature that is used in many Adidas series, including the updates of the renowned Ultraboost line.

A waffle construction with grooves and grid-like holes ensures flexibility and an additional grip on the ground. Freedom to bend and accommodate the gait cycle is the name of the game when it comes to this feature.

Midsole

The surface on which the foot relaxes is made of the Lightstrike technology. This full-length cushioning unit is meant to provide a softness that welcomes the foot. It has a lightweight construction that stands to rival the industry-standard accoutrements that are present in the industry.

The Boost™ midsole technology is still present in the Adizero Boston 9. This piece of amalgamated thermoplastic polyurethane (TPU) pellets is placed in the heel section, and it runs from that part to the point where the ball of the foot is located. Its job is to handle the impact shock generated by the landing phase of the step, transferring energy to the foot as it gears itself for the toe-off. Boost™ graces models from the Adidas roster, including the Pureboost products.

A thermoplastic cage between the midsole and outsole called the Torsion System is meant to bolster the structural integrity of the whole platform. Material sagging is averted because of the presence of this layer. It also helps the tendons of the underfoot to relax and not be overworked, particularly when tackling extended running sessions.

Upper

The upper unit of the Adidas Adizero Boston 9 is made of a textile that is configured to have a lattice design. The crisscrossing yarns aim to hold the foot securely without limiting natural movement. There are visible holes on its facade as a means of permitting environmental air into the foot-chamber, thus encouraging a cool and dry ride.

Printed overlays grace the sides, the eyestays, and the heel. These synthetic prints are meant to improve the structural integrity of the silhouette. They also help the fabrics and the lacing system when it comes to locking the foot in place and averting accidental shoe removals.

The thin anatomical tongue featured in this model contours itself to the shape of the bridge of the foot, ensuring that it doesn’t crinkle or cause chafing. It also reduces the overall bulk of the in-shoe environment.

The lightly padded collar cushions the ankles and the Achilles tendon. It also prevents the heel from exiting the interior compartment unexpectedly.

A traditional lacing system graces the upper unit. The goal of the flat shoelaces and the discreet eyelets of this system is to secure the foot and permit the runner to adjust the tightness or looseness of the wrap, thus giving a customized fit altering capacity that suits personal preferences.

Facts / Specs

Terrain: Road
Weight: Men 241g / Women 221g
Drop: 8mm
Update: Adidas Adizero Boston 10
Forefoot height: 13mm
Heel height: 21mm
Collection: Adidas Boost, Adidas Continental, Adidas Adizero, Adidas Adizero Boston

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Author
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.