Saucony Freedom ISO vs. Adidas Ultra Boost review

Saucony Freedom ISO provides a soft, comfortable, and flexible ride to neutral runners. Adidas Ultra Boost provides lots of bounce and cushioning with a performance feel.

The Saucony Freedom ISO and the Adidas Ultra Boost are both neutral cushioning running shoes for runners who do not need any kind of stability and support.

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The Saucony Freedom ISO The preceding link takes you to Amazon.com and the Adidas Ultra Boost have uppers that have been kept very light and free of an excessive amount of overlays, especially in the forefoot.

The Adidas Ultra Boost The preceding link takes you to Amazon.com has a knitted upper that does not have overlays, other than the sturdy pieces around the midfoot, while the upper of the Saucony Freedom ISO consists of structured mesh that can be pulled together around the midfoot.

The Saucony Freedom ISO comes with a no-sew overlay as a toecap, while the Adidas Ultra Boost does not come with a toecap at all, so both running shoes might be a bit less durable at the front.

At the back, both running shoes provide a good amount of heel support through the use of external structures that lock the heel down.

The Saucony Freedom ISO comes with a Support Frame that wraps around the heel, while the Adidas Ultra Boost provides a cage-like structure that cups the heel. Both structures should get the job done.

All in all, you should be able to get a comfortable fit from both running shoes, but the Adidas Ultra Boost might provide a more secure fit around the midfoot.

While the Adidas Ultra Boost and the Saucony Freedom ISO use different technologies in their midsoles, they both provide quite a bit of cushioning to neutral runners.

According to running shoe lab tests, both running shoes provide an above average amount of heel and forefoot cushioning, but the Adidas Ultra Boost is the one that delivers the softest ride, especially to men.

In the case of women, the Adidas Ultra Boost has a forefoot that is as cushy as that of the Saucony Freedom ISO, but the amount of heel cushioning it provides is almost to a maximum and above the amount delivered by the Saucony Freedom ISO.

In any case, you should be able to get a soft ride from either running shoe whether you are a man or a woman. The ride should just be a bit softer in the Adidas Ultra Boost.

The biggest difference between the midsoles can be found in things like the height and heel-to-toe drop of the running shoes.

The Saucony Freedom ISO sits a bit lower on the ground and has a smaller heel-to-toe drop than the Adidas Ultra Boost.

The heel-to-toe drop is 10.1 mm for men in the Adidas Ultra Boost and 4.9 mm in the Saucony Freedom ISO. These numbers are 10.2 mm and 4.7 mm for women.

The heel of the Adidas Ultra Boost sits about 5 mm higher off the ground than that of the Saucony Freedom ISO.

Therefore, the Adidas Ultra Boost might feel more like a performance running shoe than the Saucony Freedom ISO, but because the Saucony Freedom ISO sits lower on the ground and brings you closer to a neutral plane, it might feel more like barefoot running.

Running shoe lab tests rate the Adidas Ultra Boost and the Saucony Freedom ISO as providing an above average amount of stability.

This is probably due to the fact that they both provide a good amount of ground contact, and also because the Adidas Ultra Boost comes with a midfoot shank that extends out into the foam on the medial side of the midsole.

Despite the latter, running shoe lab tests still place both shoes on a similar level of stability.

The outsoles of the two running shoes look quite different from each other but are similar in that they do not come with deep flex grooves that separate the rubber compartments.

The rubber is like an extra layer with a good amount of separation under the midsole.

In terms of flexibility, running shoe lab tests show that the Saucony Freedom ISO is about twice as flexible as the Adidas Ultra Boost, with the latter providing an amount of flexibility that is just below average.

The women's version of the Saucony Freedom ISO weighs approximately 7.5 oz (213 grams), and the Adidas Ultra Boost for women weighs 9.3 oz (264 grams).

The men's versions of the shoes weigh 9.3 oz (264 grams) and 11.1 oz (315 grams) respectively, with the Saucony Freedom ISO being the lighter one.

If you are a neutral runner who is looking for a soft ride, you could choose either the Saucony Freedom ISO or the Adidas Ultra Boost thereby keeping in mind that the Adidas Ultra Boost is likely to deliver the softest ride.

The Adidas Ultra Boost would appeal to runners who prefer a higher heel and the feel of a running shoe pushing them forward, while the Saucony Freedom ISO would appeal to runners who like a more natural feel of being closer to the ground.

Note: The weight of a running shoe depends on the size of the running shoe, so any weights mentioned in this review may differ from the weight of the running shoe you choose to wear. Running shoes of the same size were compared for this review.

The two links above will take you to Amazon.com where you can read more about the running shoes.


This review falls under: Saucony

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