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Home / Running Shoe Reviews / Lightweight Running Shoes

Meet The Brooks Glycerin Flex A Refreshing Alternative to Max Cushion

Last Updated on June 24, 2026 by Amanda Brooks
We independently review everything we recommend. When you buy through our links, we may earn a commission.
2 Comments
94% rating

Anyone else been feeling a little bit like you’d might be seeking a less max stack cushioned shoe?? After testing hundreds of plush shoes, I found myself immediately drawn to the feel of the Brooks Glycerin Flex.

Brooks Glycerin Flex ReviewBrooks is calling this a more natural feel shoe, which brings to mind the Escalante and other zero drop almost no cushion shoes. That’s not what you’re getting here, the cushion remains. Whew, don’t come for my cushion I’ve come to really enjoy it.

The design of many running shoes now is controlling foot movement, which does provide efficiency in movement, but might be throwing off how our body wants to move. It’s why we advise against stability shoes for the majority of runners.

So Brooks asked can we give people a flexible shoe to move with their foot that’s NOT thin, boring and lacking the cushion we have all come to love? They went deep on technology to produce something that I think a lot of you are going to appreciate. Ok, at least I am appreciating it!

Who Is It Good For?

Who is Brooks Glycerin Flexย a good fit for? Letโ€™s break it down with some common categories:
  • Wide Feet: Knit upper will stretch, so it might accommodate a wider foot
  • Heavier Runners: Plenty of cushion and durability.
  • Long Runs:ย Great option to have cushion without being in a max cushion shoe.
  • Front of the Pack: Can pick up the pace, but not a super fast race shoe.
Buy Brooks Glycerin Flex

The Glycerin Flex is a great daily trainer with fairly light weight, plenty of cushion and going to move easily with your foot. It’s going to be a shoe that could also go with you for gym classes, pickleball, and some other workouts.

Brooks Glycerin Flex Overview

My first step in was not love, so that makes it all the more interesting that now I’m head over heels for this shoe. But only for running, not for walking, which is all due to the gel pads instead of foam in the heel cup.

That’s obviously not the important thing about this shoe which has a super unique modular outsole, creating the ability for the shoe to seriously flex. But comfort and fit is still priority one, so let’s run through all the things you need to know about this shoe.

Brooks Glycerin FlexWhy is this different?

As shoes have gotten bigger (read more cushioned), you’ll see that most are fully connected along the midsole and need a meta rocker or other features to help with that roll from heel to toe. Not everyone loves this feeling and it does mean the shoe is doing some of the work for you.

Here the forefoot and midsole are de-coupled, allowing for that full twisting motion you see. Which means that your foot can also roll through a full range of motion or more easily change directions, dash side to side with less rolled ankles.

Natural still feels like a debatable term here as we do have a lot of cushion. But sure, it does give more freedom of movement.

Brooks Glycerin Flex OverviewThe DNA tuned midsole still has that great Glycerin cushioned feel that we enjoyed in the Glycerin Max 2, BUT on a much smaller scale making it more like my go to Saucony Kinvara. This feels like you can pick up the pace, even though it doesn’t have a rocker it’s just not as much shoe.

How does it feel?

Cushioned. Instead of feeling over cushioned, it just felt nice. It still had a little bounce, plenty of under foot comfort, but there was no sinking in to the shoe. I put it on for daily runs up to 8 miles (sorry right now I’m working through injury and that’s my max!). I would happily wear it for longer, but I think might cap at 13.

If you haven’t been doing any kind of foot strength, you might feel like your feet and ankles need a little adjustment to this shoe.

Brooks Glycerin Flex LacesThe upper is very different from other Glycerin shoes. The knit may not feel as locked in for some of you, I happy to love this style of shoe because it does feel more flexible and harkens back to the other shoe that I went through like 10 pairs of the Nike Flyknit React.

Brooks Glycerin Flex Specifications

  • Brand: Brooks
  • Usage: Daily Trainer
  • Previous Model: None
  • Weight: 8 oz womenโ€™s, 8.8 oz menโ€™s
  • Stack: 36 mm
  • Heel toe drop: 6 mm
  • Available in 4 colors
  • Not available in wide
  • Available on Brooksrunning.com for $170ย 

Quick Take

Pros
  • 6mm drop is great to see in Brooks.
  • Good cushion at lower stack.
  • Allows for natural movement of the foot.
Cons
  • Gel pads in heel cup.
  • Not good if you need some stability.
  • Tongue not attached.

Brooks Glycerin Flex Outsole

The outsole is also sticky for some great grip. I wouldn’t hesitate to wear this on wet roads and I mean I guess in the snow except your feet would be very cold. I’d also consider this for pickleball and some other quick gym movements.

Brooks Glycerin Flex Fit

As alluded to at the beginning I did have a fit issue. The heel cup uses little gel pads and they just kind of stick out. Every single time I put this shoe on, I almost immediately take it off thinking I’m going to have a blister there. But as soon as I start running the sensation is gone.

However, walking I still feel the pads and dislike. I want to not think about my shoe at all while wearing it.

Length standard Brooks sizing, the mid-foot I do think is a bit more narrow, which might just be due to the knit upper and flat tongue.

Brooks Glycerin Flex Heel Collar

Those components are going to give it a more fitted feel and that’s something I generally like in running shoes. It means nothing is moving around.

The tongue is not attached on the sides, which feels like a no brainer at this point. Keep it from moving and make us all happy. Kind of oddly shaped, so it looks like the tip could dig in to your ankle, but again no issues. And yes, part of what we do in testing 200+ shoes a year is get really picky so you know what to expect.

Brooks Glycerin 23 vs Brooks Glycerin Flex

The Glycerin has been a staple cushioned shoe in the line up for years, so let’s see why it’s different and which one you might prefer. Our full review of the brand new 23 is coming out in a few days.

Brooks Glycerin 23 Wear

  • Glycerin 23 is a 8mm drop, much more standard for Brooks
  • Glycerin is more cushioned to feel really comfortable for marathon long runs
  • Flex is lighter and feels easier to pick up the pace
  • Flex isn’t going to guide your foot as much, meaning you’ll notice if you have too much pronation

Similar Shoes to the Brooks Glycerin flex

All right, let’s talk about what might be similar to this moderate cushioned shoe. The truth is there’s almost nothing with cushion at this level of flexibility, so we’re mostly looking at what has a similar level of cushion.
  • Saucony Kinvara 16 – 29mm stack height, but still cushioned and love the 4mm drop and lightweight
  • Hoka Mach 6 – Another moderate cushioned shoe that’s light
  • NB Rebel V5 – Softer underfoot, similar drop
Buy Brooks Glycerin Flex

There you have it, our Brooks Glycerin Flex review.

As always, love to hear feedback if youโ€™ve taken the shoe out or if there are other models youโ€™re curious about.

</b>Our Verdict<b>

94%

We were immediately taken with the feel of the Glycerin Flex, providing the cushion we enjoy but with less shoe underfoot. It feels like the direction we think more daily trainers will be going and we approve. It’s not for those who need any stability, but a great feel and durable thanks to the outsole rubber.

What to read next?

  • Are Max Cushioned Shoes Bad For Us?
  • 7 Best Brooks Shoes for Walking or Standing All Day
  • Brooks VS New Balance Running Shoes
Category: Brooks, Daily Trainer, Lightweight Running Shoes, Moderate Drop (5-8mm), Running Shoe Reviews, Wide Shoe

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Author

Amanda Brooks
I am a running coach with over a decade of experience helping thousands of runners to achieve their goals from running injury free to crossing that marathon finish line with a PR. I’ve run over 28,000 miles in my own running journey since 2002. Run To The Finish is my place to share that love and my deep dive in to researching all things running. I hold multiple run coaching certifications, as well as a personal training certification. But it’s my ongoing desire to learn and progress as a coach that has allowed me to help runners from their 20’s through their 70’s! More ways to connect with me:
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Reader Interactions

Comments

  1. Jess Y

    February 2, 2026 at 2:38 am

    Hi Amanda, can I assume that if we wear orthotics, these shoes wouldnโ€™t be the best as the flexibility would be made redundant by stiff orthotics? Or still worth a try?
    Thank you

    Reply
    • Amanda Brooks

      February 2, 2026 at 9:18 am

      Hey Jess, I’d say you probably won’t get the benefit of the shoe as it would be fighting the orthotic in some ways.

      Reply

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