Saucony Freedom ISO vs. Saucony Freedom ISO 2 review

Saucony Freedom ISO provides a soft, comfortable, and flexible ride to neutral runners. Saucony Freedom ISO 2 has an updated upper with ISOKNIT and a few other changes...

The Saucony Freedom ISO 2 is the updated version of the Saucony Freedom ISO, which is a running shoe for neutral runners and runners who have medium to high arches.

The upper of the Saucony Freedom ISO 2 The preceding link takes you to Amazon.com has changed a bit compared to that of the Saucony Freedom ISO.

For starters, the Saucony Freedom ISO The preceding link takes you to Amazon.com makes use of engineered stretch mesh to provide lightweight structure and support, while the Saucony Freedom ISO 2 has a knitted upper that delivers targetted support and breathability.

The Saucony Freedom ISO 2 combines ISOFIT with an engineered performance knit to deliver support through the upper. Together they are called ISOKNIT.

The no-sew overlays along the saddle of the Saucony Freedom ISO have been extended a bit in the Saucony Freedom ISO 2 to meet the Saucony logo and deliver a better hold around the midfoot.

What has not changed are the individual sections in the saddle that can be customized to give you a more pesonalized fit.

The upper of the Saucony Freedom ISO 2 is a little bit more closed along the edge of the midsole due to the knitted upper, but there are more holes in the area of the bunion window.

Nonetheless, the fit might be a bit tighter in the Saucony Freedom ISO 2 than it is in the Saucony Freedom ISO.

Both the Saucony Freedom ISO and the Saucony Freedom ISO 2 come with an external heel counter that wraps the upper part of the heel to lock the heel in and minimize heel rotation.

While this can be seen as a stability feature that increases the amount of support delivered by the Saucony Freedom ISO and the Saucony Freedom ISO 2 as a neutral running shoe, its function is more to provide a better heel fit in both running shoes.

The Saucony Freedom ISO 2 is a bit more open at the front than the Saucony Freedom ISO, so the latter might be a bit more durable in that area but not by much.

All in all, the upper of the Saucony Freedom ISO 2 has changed enough for it to feel different on your foot, but you should be able to get a similar amount of support, if not a bit more, from the upper of the Saucony Freedom ISO 2 compared to that of the Saucony Freedom ISO.

While it is not clear whether the Saucony Freedom ISO 2 still has an EVERUN topsole construction like the Saucony Freedom ISO does, because an EVERUN topsole has not been listed by Saucony for the Saucony Freedom ISO 2, the midsole of the Saucony Freedom ISO 2 has also undergone some changes.

Both the Saucony Freedom ISO and the Saucony Freedom ISO 2 come with a full-length EVERUN midsole, but unlike the Saucony Freedom ISO, the Saucony Freedom ISO 2 has some elevated sections along the top edge of its midsole.

These sections are clearly visible on the lateral side near the end of the Support Frame, on the lateral and medial sides near the big toe and little toe, and behind the heel.

This should give your foot a better bed to sit in and further increase the stability of the Saucony Freedom ISO 2.

Saucony also lists the Saucony Freedom ISO 2 as having gained a little bit of height in the heel and the forefoot but not in heel-to-toe drop.

Both the Saucony Freedom ISO and the Saucony Freedom ISO 2 are running shoes that sit relatively low on the ground and that bring you closer to a neutral plane with a heel-to-toe drop of close to 4 mm.

However, the Saucony Freedom ISO 2 sits about 3 mm higher off the ground under the heel and the forefoot, according to data released by Saucony.

Therefore, the Saucony Freedom ISO 2 would have a somewhat thicker midsole than the Saucony Freedom ISO and thus also deliver a bit more cushioning but still give you the low heel-to-toe drop you expect to get from the Saucony Freedom ISO.

However, Saucony has listed both the Saucony Freedom ISO and the Saucony Freedom ISO 2 on the same location on the plush cushioning scale, and they are both listed fairly high, so you can expect to get an overall soft ride from both running shoes.

What is surprising to see, though, is that the Saucony Freedom ISO 2 has been given one notch less on the neutral scale, so has been moved further away from the light stability scale, which means that Saucony considers the Saucony Freedom ISO to be a bit more stable than the Saucony Freedom ISO 2.

However, if you are a neutral runner, stability is not what you would be looking for, and both the Saucony Freedom ISO and the Saucony Freedom ISO 2 can be seen as stable neutral running shoes but are probably not suitable for overpronators.

The rubber outsoles of the Saucony Freedom ISO and the Saucony Freedom ISO 2 look largely the same, except for the fact that the Saucony Freedom ISO 2 has three vertical flex grooves under the forefoot and one on the medial side under the heel and the midfoot.

The outsole of the Saucony Freedom ISO does not have any vertical flex grooves, except for an open area just under the midfoot, which the Saucony Freedom ISO 2 also has.

Therefore, there is a bit more separation and less rubber in the outsole of the Saucony Freedom ISO 2, which should give it lateral flexibility.

The Saucony Freedom ISO has been found to be quite flexible for both men and women, but because of the small increase in midsole thickness of the Saucony Freedom ISO 2, the Saucony Freedom ISO 2 might not display the same flexibility as the Saucony Freedom ISO but feel perhaps somewhat stiffer.

The Saucony Freedom ISO 2 has gained 0.1 oz (3 grams) in weight compared to the Saucony Freedom ISO for both men and women.

Perhaps this small increase in weight is due to the somewhat thicker midsole of the Saucony Freedom ISO 2, and perhaps the extra vertical grooves in the outsole of the Saucony Freedom ISO 2 was to bring down the weight of the Saucony Freedom ISO 2; only Saucony would know...

In any case, the weight increase is not significant enough to affect your run.

If you are a neutral runner who is looking for a soft ride from a running shoe that brings you closer to a neutral plane, you could look into either the Saucony Freedom ISO or the Saucony Freedom ISO 2.

The Saucony Freedom ISO 2 is a nice update of the Saucony Freedom ISO that gives this running shoe model a more solid upper.

However, there have been enough changes made compared to the Saucony Freedom ISO to make the Saucony Freedom ISO 2 feel different on your foot, so you are advised to try on the Saucony Freedom ISO 2 and see whether you like this new version if you have already been running in the Saucony Freedom ISO.

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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