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Zealot ISO 3

£125.00
GBP 125.00
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Product Details
Lightweight, fluid and flexible, the Zealot ISO3 delivers Saucony’s very best running innovations into a streamlined, energized package. The 3mm EVERUNTM topsole construction provides an energized ride, while the TRI-FLEX outsole gives just enough flexibility and freedom of movement with every stride.

Overview

  • Successor to the Zealot ISO 2
  • Brand new engineered mesh brings a more dynamic, adaptable fit
  • Molded heel collar provides a lockdown heel fit
  • New ISOFIT design focuses on a dynamic, adaptive midfoot fit
  • EVERUNTM topsole construction provides continuous cushioning from heel strike to toe-off
  • New TRI-FLEX outsole design focuses on forefoot flexibility and a smooth, flowing transition

Specs

  • Shoe Category: Neutral
  • Pronation: Neutral
  • Cushion: Plush
  • Construction Type: Natural Motion
  • Surface: Road, Track
  • Arch: High, Normal (mid)
  • Water Resistant: No
  • Waterproof: No
  • Offset: 4mm
  • Heel Stack Height: 26
  • Forefoot Stack Height: 22
  • Weight: 8.5 oz. | 241 g.

Cheat Sheet: check out our technical running terms guide >
Technology

4MM

Saucony 4mm Technology

Shoes with a 4mm heel-to-toe offset deliver a more natural ride, letting your feet and body do more work while relying less on the shoes’ cushioning and stability features.

FLEXFILM

Saucony Flexfilm Technology

A strong, lightweight material is melded to the upper, which allows for fewer layers in the shoe. The result is a seamless, flexible feel.

ISOFIT

Saucony ISOFIT Technology

Revolutionary fit system that morphs to the foot for a custom feel.

TRI-FLEX

Saucony TriFlex Technology

Increases force dispersion over a greater surface area while also delivering optimal flexibility and traction.

Zealot ISO 3 Infograph

Cushioning

The underfoot feel and amount of impact protection provided by the compressing materials between the foot and running surface.

Support

The level of pronation control built into the shoe. Pronation is the inward rolling of the ankle through the gait cycle.

Offset

The difference in height between the heel thickness and forefoot thickness of the shoe.

Ratings & Reviews (2.0)
(2)
4.5
Rating Breakdown
Rating Breakdown
5 Stars
(1)
4 Stars
(1)
3 Stars
(0)
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1 Star
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100% of reviewers recommend this product

Performance
Style:
Durability:
5 5
Return to Greatness Like the first reviewer, I've been a huge fan of the original Zealot ISO. The ISO 2 was (for me) a flop. The toe box was too narrow and the shoe felt dead. I've spent the last year stocking up on the original model since it worked so well for me. I tried out the ISO 3 a few days ago and it seemed they had fixed the ISO 2 problems and then some. After a couple of runs, one easy pace and one running 8 x 800 m intervals, I'm a big fan again. The toe box is a good width again, it's more responsive than the first model and still has decent cushioning but not spongy. FYI, I am a road runner who trains/races for marathons, halfs, 10Ks and 5Ks. I average about 40 mpw. The only minor thing I'd request is providing more color options. Saucony often intros shoes with a few colors and then brings along more color options later so I'll be patient. Anyway, nice job on this model and keep up the good work!

Return to Greatness

Jul 17, 2017
Like the first reviewer, I've been a huge fan of the original Zealot ISO. The ISO 2 was (for me) a flop. The toe box was too narrow and the shoe felt dead. I've spent the last year stocking up on the original model since it worked so well for me. I tried out the ISO 3 a few days ago and it seemed they had fixed the ISO 2 problems and then some. After a couple of runs, one easy pace and one running 8 x 800 m intervals, I'm a big fan again. The toe box is a good width again, it's more responsive than the first model and still has decent cushioning but not spongy. FYI, I am a road runner who trains/races for marathons, halfs, 10Ks and 5Ks. I average about 40 mpw. The only minor thing I'd request is providing more color options. Saucony often intros shoes with a few colors and then brings along more color options later so I'll be patient. Anyway, nice job on this model and keep up the good work!
Saucony's reply

We do what we can! Glad you found a new favorite! #RunYourWorld

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4 5
Great Improvements I was a huge fan of the Zealot ISO 1. So much so that I stocked up on them when they were discontinued because the Zealot ISO 2 wasn't cutting it for me. I'm happy to say this 3rd version is an excellent update and making me a Zealot fan all over again. The upper is excellent. The new mesh is light, it breathes, it's soft, and it feels more relaxed. I can see it accomodating a variety of foot shapes. If you have a high volume foot, like me, or like a little extra room, I think you'll like this update as well. This is also probably the best implementation of the ISO bands to date. I usually get hot spots around my 1st metatarsal/bunion area in most shoes. I haven't had any issues with this shoe at all yet, even on long runs. My only complaint is the sizing, which I'll touch on later. The midsole of Zealot ISO 1 felt a little firm, but in a good way. The Zealot ISO 2 felt "dead" to me. It lost that responsiveness and I felt sluggish wearing them. I always said if the original Zealot ISO 1 was a touch softer, and lost the first ISO band (around the first metatarsal), it would be a perfect shoe. This new iteration does just that. It goes back to the original cushion, but definitely softer, while retaining the responsiveness. I love it. If you're a fan of the Kinvara, but need more cushion, this is the shoe for you. My only knock on this version is the sizing. I generally wear a half size up for Saucony (Kinvara, Zealots, and Trumph ISO). I did the same with the Zealot ISO 3, but I'm not sure I had to. It feels a little bit longer than what I'm used to, but only at the tip. I'm not sure if they narrowed the front of the shoe, or if it's all in my head. I suspect if I went a half size down, it would feel too tight, so I'm stuck in between sizes. I would recommend trying them before buying. Great job, Saucony!

Great Improvements

Jul 14, 2017
I was a huge fan of the Zealot ISO 1. So much so that I stocked up on them when they were discontinued because the Zealot ISO 2 wasn't cutting it for me. I'm happy to say this 3rd version is an excellent update and making me a Zealot fan all over again. The upper is excellent. The new mesh is light, it breathes, it's soft, and it feels more relaxed. I can see it accomodating a variety of foot shapes. If you have a high volume foot, like me, or like a little extra room, I think you'll like this update as well. This is also probably the best implementation of the ISO bands to date. I usually get hot spots around my 1st metatarsal/bunion area in most shoes. I haven't had any issues with this shoe at all yet, even on long runs. My only complaint is the sizing, which I'll touch on later. The midsole of Zealot ISO 1 felt a little firm, but in a good way. The Zealot ISO 2 felt "dead" to me. It lost that responsiveness and I felt sluggish wearing them. I always said if the original Zealot ISO 1 was a touch softer, and lost the first ISO band (around the first metatarsal), it would be a perfect shoe. This new iteration does just that. It goes back to the original cushion, but definitely softer, while retaining the responsiveness. I love it. If you're a fan of the Kinvara, but need more cushion, this is the shoe for you. My only knock on this version is the sizing. I generally wear a half size up for Saucony (Kinvara, Zealots, and Trumph ISO). I did the same with the Zealot ISO 3, but I'm not sure I had to. It feels a little bit longer than what I'm used to, but only at the tip. I'm not sure if they narrowed the front of the shoe, or if it's all in my head. I suspect if I went a half size down, it would feel too tight, so I'm stuck in between sizes. I would recommend trying them before buying. Great job, Saucony!
Saucony's reply

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