Brooks Womens Glycerin 21 Neutral Running Shoe - Plush Cushioning

Our review of the Brooks Womens Glycerin 21 finds it best for runners who prioritize plush cushioning and all-day comfort. The standout is the revamped nitrogen-infused DNA Loft v3 cushioning that delivers a soft, responsive ride without feeling overly heavy, making the Glycerin 21 ideal for long runs, recovery days, or extended time on your feet. The shoe's internal stretch bootie and warp knit upper create a snug, plush fit that adapts to the foot, which many wearers describe as "like walking on air."

Key Features

• Neutral support: Designed for neutral runners, it provides the maximum amount of cushioning for road running, gym sessions, and cross training without added corrective elements.
• Supreme softness: Nitrogen-infused DNA Loft v3 cushioning is optimized to be lightweight, responsive, and durable for a consistently plush feeling underfoot.
• Plush improved fit: An internal stretch bootie and engineered warp knit upper surround the foot for a breathable, flexible, and accommodating fit that expands with your stride.
• Smooth transitions: A broad platform stabilizes the foot and promotes smooth heel-to-toe transitions for comfortable forward motion on runs or walks.
• APMA acceptance: This model has earned the APMA Seal of Acceptance, indicating attention to foot health and supportive design choices.

Who It's For

The Glycerin 21 is aimed at neutral runners and walkers who want maximum plush cushioning and a soft internal fit for long days on pavement or in the gym. It suits runners looking for comfort-first road shoes, people who do lots of walking for work or travel, and anyone who values a softer ride over a firm, performance-focused shoe.

Runners needing corrective support should consider the Glycerin GTS 21 or other stability models, and those seeking a minimal, highly responsive race shoe may find the plush DNA Loft v3 too soft for fast, tempo efforts.

Pros & Cons

Pros

• Exceptionally plush, comfortable cushioning that many describe as walking on air.
• Internal stretch bootie and warp knit upper deliver a snug, breathable fit that adapts with each stride.
• Broad platform and design promote smooth, stable heel-to-toe transitions for everyday running and walking.
• APMA Seal of Acceptance supports the shoe's foot-friendly construction.

Cons

• Sizing reports vary among customers, so some may need to try a half size up or down to find the preferred fit.
• The very soft cushioning may feel less energetic for runners seeking a firmer, race-oriented ride.

Specifications

Model	Glycerin 21
Support type	Neutral support
Cushioning	Nitrogen-infused DNA Loft v3
Upper	Engineered warp knit with internal stretch bootie
Best for	Road running, walking, cross training, gym
Predecessor	Glycerin 20
Certifications	APMA Seal of Acceptance

Our Verdict

The Brooks Glycerin 21 is a strong choice for runners and walkers who want maximum plush cushioning and a soft, adaptive fit. It represents good value for those prioritizing comfort and support during long miles or all-day wear, though runners seeking firm responsiveness or precise sizing may want to try them on first.

Frequently Asked Questions

Do these run true to size?
Customer reports vary; some find them true to size while others recommend trying a half size up or down to confirm the best fit.

Are they suitable for daily walking?
Yes, the plush cushioning and stable platform make them excellent for daily walking and standing for extended periods.

Is there a stability version?
Yes, the Glycerin GTS 21 offers a similar plush feel with added support for overpronation.