Ultraboost 21

It’s been six years since the first Ultraboost made its debut. But nothing is stopping the Three Stripes from continuously developing the shoe into a performance-focused running shoe for athletes.

New features arise as the Ultraboost 21 sports a whole new aesthetic after the similar build of the previous two models. From the upper to the outsole, adidas upgraded the latest Ultraboost running trainer.

Starting with the upper, Primeknit+ forges with Primeblue for a reinforced upper that provides support and makes your movement feel more natural. Primeblue is adidas’ high-performance recycled knit material with the help of Parley For the Oceans. It contains 50% Parley Ocean Plastic and doesn’t compromise the durability and comfort.

The footwear line’s beloved separate lace cage makes the shoe stable so you won’t have to worry about lateral issues. The TPU heel clip now also cups until the midfoot for better fit and increased support. All of these are important features for a sock-like runner.

More running-focused features have been adidas’ main goal with the latest Ultraboost 21. A new torsion system called Linear Energy Push (LEP) provides increased responsiveness due to the stiff LEP plate within the midsole. It reduces flexibility but gives you a spring-like push with every step.

With the interior plate in the foam midsole, Boost also increased in size. This Ultraboost now contains 6% more Boost capsules than the previous Ultraboost 20 silhouette. The heel stack height runs at 30.5 millimeters, while the forefoot is thinner at about 20.5 millimeters. This is important for runners as it’s the amount of material between the foot and the floor, helping them respond quickly.

Finishing the performance shoe is the newly-designed Stretchweb outsole made with durable Continental rubber. Formerly, the Stretchweb pattern boasts a rather grid-like traction. But this one appears in a seemingly track oval shape. There’s an oval traction pod on the forefoot, while the rest of the rubber portions cover the outer area of the outsole.

Various collabs appeared on the Ultraboost 21. Parley, Stella McCartney, and the forthcoming partnership with Palace Skateboards are just some of them.

The Brand with the Three Stripes remains hungry and curious with their running shoes. And the latest silhouette in the Ultraboost line is a testament to that. Despite ditching the casual, more fashionable style of the first Ultraboost for a performance-focused design, adidas continues to find ways to bring the shoe into lifestyle.

One thing is for sure, the Ultraboost is and will always be one of the most comfortable sneakers around.

Check out some of the latest Ultraboost releases below: