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AVAILABLE FOR PREORDER
Select Colour
135 - White/Grey/Black
Select Width
Free* standard shipping & returns, always.
Brooks Run Happy Promise
Our goal is to make each run better than the last. The gear we offer should improve your miles. So if you’re not happy with a product, then we’re not happy either.
90-day trial run — our guarantee
We think you’ll love our products because thousands of other runners already do. So take our gear for a 90-day test run. If you don’t love it, return it for free. Really.
Our return policy
If you buy gear from us today, you have 90 days to wear it all you want and still return it if you don’t love it.
Free standard shipping
Free* standard shipping on all orders over £75. Orders under £75 are charged a £5 shipping fee. Returns are always for free.
Super soft. Supportive. Sleek. Now that's a powerful trio. Featuring more plush cushioning than before, our innovative whole-body support system, and streamlined style, the Glycerin StealthFit GTS 21 men's running shoe is ready for anything.
Sustainability
Running Responsibly
We are committed to a long-term, science-based approach to sustainability. We know it's time to think bigger about the impact our products and their full life cycle have on people and the planet.
Percentage of recycled content
-
This metric refers to the percentage of material by weight that has been recycled from post- or pre-consumer sources.
Number of plastic bottles
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Our roadmap to use recycled raw materials initially focuses on post-consumer sources, such as plastic bottles.
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With help from our suppliers, we calculate the number of plastic bottles used to make a size medium of each product.
Climate action
We are using sound science to address climate change and align our efforts across every level of our business to reduce carbon emissions. This includes product designs, materialization, manufacturing, and our global supply chain.
LEARN MORE
Sustainable consumption
As we create new gear and run our global business, we also want to minimize our impact on the planet — so we are limiting our reliance on non-renewable resources by using more sustainable materials and reducing waste.
LEARN MORE
Responsible sourcing
An ethical global supply chain starts with factories and suppliers who share our values and our commitments to respect human rights, advance worker well-being and ensure sustainable manufacturing.
LEARN MORE
Running Responsibly
We are committed to a long-term, science-based approach to sustainability. We know it's time to think bigger about the impact our products and their full life cycle have on people and the planet.
Percentage of recycled content
- This metric refers to the percentage of material by weight that has been recycled from post- or pre-consumer sources.
Number of plastic bottles
- Our roadmap to use recycled raw materials initially focuses on post-consumer sources, such as plastic bottles.
- With help from our suppliers, we calculate the number of plastic bottles used to make a size medium of each product.
Climate action
We are using sound science to address climate change and align our efforts across every level of our business to reduce carbon emissions. This includes product designs, materialization, manufacturing, and our global supply chain.
LEARN MORESustainable consumption
As we create new gear and run our global business, we also want to minimize our impact on the planet — so we are limiting our reliance on non-renewable resources by using more sustainable materials and reducing waste.
LEARN MOREResponsible sourcing
An ethical global supply chain starts with factories and suppliers who share our values and our commitments to respect human rights, advance worker well-being and ensure sustainable manufacturing.
LEARN MOREBest for…
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Supreme softness
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Adaptable fit
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Support
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Road running
Features
- Supreme softness
- Adaptable fit
- Whole-body support
|
Designed for |
Road
|
|
Midsole drop |
10mm
|
|
Weight |
10.0oz / 283.5g
|
Experience
Cushion
A smooth and floaty-feeling run thanks to plush cushioning designed to help you enjoy and savor your run.
Support level
Support Guide
Neutral
Brooks shoes that are designated “neutral” are designed to deliver comfort and durability for a neutral stride — one that doesn’t need additional support.
Support
Brooks shoes with the “GTS” designation feature our Go-To-Support, which helps keep runners in their natural stride, even when they tire. Think of bumpers in a bowling lane!
Maximum Support
To provide maximum support, we pair our go-to-support (GTS) with additional features such as an extra wide base to enhance stability.
Not sure if you need support?
Use the questions below or complete the self-assessment in our 5-minute Shoe Finder Quiz.
You may benefit from extra support if:
- Your knees move inward or touch when you do a simple squat
- You frequently get the same injury
- You pronate or supinate
- Your toes point in or out when you walk
- Neutral
- Support
- Maximum Support
APMA Seal of Acceptance
APMA Seal of Acceptance
APMA Seal of Acceptance
The American Podiatry Medical Association (APMA) Seal of Acceptance recognises products that promote good foot health. At Brooks, products across seven of our key franchises feature the APMA Seal of Acceptance. This Achievement highlights our leadership in biomechanical research for runners and anyone who spends extended time on their feet.
Super soft. Supportive. Super sleek.
Cushy comfort
Supreme softness
Compared to the Glycerin 20, the Glycerin 21 features 2mm more of our super-soft, nitrogen-infused DNA LOFT v3 cushioning to maximise softness.
Sleek and stealthy feel
Adaptable fit
Updated, soft flat knit upper offers a blend of stretch and compression that moves with your foot.
Stay in your stride
Smart support
Our innovative GuideRails® technology supports your body in its natural motion path while keeping excess movement in check.
Compare
Cushion Level
Most
Most
Most
Most
Midsole Drop
10mm
10mm
10mm
10mm
Features
Soft and Smooth
Soft and Supportive
Soft and Adaptable
Adaptable and Supportive
Weight
277.8g
297.7g
263.7g
283.5g
Support Level
Neutral
Support
Neutral
Support
Let's see how Glycerin 20 and Glycerin 21 stack up.
This depends on how your body moves during your run.