Brooks Glycerin GTS 21 Supportive Running Shoe - Plush Support Shoes

Our review of the Brooks Glycerin GTS 21 finds it best for runners who prize maximum cushioning but still need reliable support. The single biggest reason to consider these shoes is the combination of nitrogen-infused DNA LOFT v3 foam for pillowy softness with Brooks' GuideRails holistic support that keeps excess motion in check. Worn on road runs, at the gym, or during long days on your feet, the Glycerin GTS 21 delivers a plush, stable ride while the engineered warp knit upper and internal stretch bootie improve fit and comfort.

Key Features

• GuideRails support: The holistic support system controls excess movement to protect knees and keep the foot aligned during runs and cross training.
• DNA LOFT v3 cushioning: Nitrogen-infused foam offers supreme softness that remains responsive and durable for long, comfortable miles.
• Warp knit upper: The newly engineered knit is breathable and flexible, giving an accommodating fit that feels soft against the foot.
• Internal stretch bootie: A plush bootie wraps the foot and expands with the stride for a more secure, comfortable fit.
• Broad platform: A wider base stabilizes transitions from heel to toe for a smooth, steady ride.

Who It's For

The Glycerin GTS 21 is ideal for road runners and gym-goers who want maximal cushioning without sacrificing support, including those who experience foot discomfort or need extra arch assistance. Runners who appreciate a plush underfoot feel and require a stable platform for longer runs will find these particularly comfortable.

Those who prefer a very firm, minimalist shoe or who need a lightweight race shoe should look elsewhere, as the Glycerin GTS 21 prioritizes softness and stability over minimal weight and responsiveness for tempo performance.

Pros & Cons

Pros

• Exceptional cushioning that stays soft yet responsive across runs.
• Reliable GuideRails support that helps reduce excess motion and knee strain.
• Comfortable, breathable warp knit upper and internal bootie for improved fit.

Cons

• Some users report mixed durability, so longevity may vary based on use and mileage.

Specifications

Model	Glycerin GTS 21
Support System	GuideRails holistic support
Cushioning	Nitrogen-infused DNA LOFT v3
Upper	Engineered warp knit with internal stretch bootie
Best For	Road running, cross training, gym use
Predecessor	Glycerin GTS 20
Seal	APMA Seal of Acceptance

Our Verdict

The Glycerin GTS 21 is a great choice for runners seeking plush cushioning plus dependable support; it excels in comfort and stability and is particularly good for those with foot pain or wider feet. While some wearers note variable durability, the combination of DNA LOFT v3 softness and GuideRails support offers strong value for daily road miles and cross training.

Frequently Asked Questions

Are these shoes good for wide feet?
Yes, customers report the warp knit upper and internal bootie accommodate wider feet comfortably.

Do they help with knee or foot pain?
The GuideRails support and plush cushioning have helped many users reduce knee strain and improve foot comfort.

Are they suitable for racing?
They are designed for comfort and support rather than lightweight racing; choose a lighter model for race day.