Brooks Women’s Glycerin 21 Neutral Running Shoe - vs Under Armour Women's Charged Assert 10,
Updated August 2026 — Brooks Women’s Glycerin 21 Neutral Running Shoe - wins on fit and comfort, Under Armour Women's Charged Assert 10, wins on weight.
The Brooks Women’s Glycerin 21 offers superior cushioning and comfort, making it ideal for serious runners, while the Under Armour Women's Charged Assert 10 is a budget-friendly option with decent features.
Why Brooks Women’s Glycerin 21 Neutral Running Shoe - is better
Cushioning
Glycerin 21 features nitrogen-infused DNA Loft v3 cushioning.
Comfort
Glycerin 21 provides a plush internal fit.
Durability
Glycerin 21 uses premium materials for longevity.
Why Under Armour Women's Charged Assert 10, is better
Price
Charged Assert 10 is significantly cheaper.
Weight
Charged Assert 10 is lighter at 8.9 oz.
Flexibility
Charged Assert 10 offers good flexibility for casual runs.
Overall score
Specifications
| Spec | Brooks Women’s Glycerin 21 Neutral Running Shoe - | Under Armour Women's Charged Assert 10, |
|---|---|---|
| Brand | Brooks | Under Armour |
| Model | Glycerin 21 | Charged Assert 10 |
| Cushioning | DNA Loft v3 | Charged Cushioning |
| Upper | Warp Knit | Mesh |
| Support | Neutral | Neutral |
Dimension comparison
Overview of the Brooks Women’s Glycerin 21 and Under Armour Women's Charged Assert 10
The Brooks Women’s Glycerin 21 is priced at $114.95, while the Under Armour Women's Charged Assert 10 is significantly cheaper at $54.95, making it about 52% less expensive. Both shoes are designed for neutral support, catering to runners who appreciate comfort and cushioning. The Glycerin 21 is positioned as a premium option with advanced cushioning technology, while the Charged Assert 10 offers a more budget-friendly alternative with essential features for everyday runs.
Design and Aesthetics
The Brooks Women’s Glycerin 21 features a sleek design in black, grey, and white that appeals to runners looking for a modern aesthetic. Its engineered warp knit upper provides a breathable and flexible fit, enhancing overall comfort. In contrast, the Under Armour Women's Charged Assert 10 also comes in a minimalist black design but incorporates a lightweight, breathable mesh upper with synthetic overlays for added durability. Both shoes emphasize a contemporary appearance, but the Glycerin 21 prioritizes a plush feel with its internal stretch bootie, making it an appealing choice for those who value comfort over style.
Comfort and Cushioning
When it comes to comfort, the Brooks Women’s Glycerin 21 excels with its super-soft nitrogen-infused DNA Loft v3 cushioning, designed to provide plush comfort over long distances. This shoe is ideal for runners seeking maximum cushioning, making it suitable for road running and cross-training. On the other hand, the Under Armour Women's Charged Assert 10 incorporates Charged Cushioning technology, which uses compression molded foam for responsive cushioning. While it offers good comfort, it may not match the supreme softness of the Glycerin 21. This difference is crucial for runners who log many miles and require superior cushioning to reduce fatigue.
Performance and Support
The Brooks Women’s Glycerin 21 is designed for neutral support, providing a broad platform that stabilizes the foot and promotes smooth transitions. This makes it excellent for runners who prioritize stability during their runs. The Under Armour Women's Charged Assert 10 also offers neutral support, catering to runners who need flexibility and cushioning. Its solid rubber outsole is designed to cover high-impact zones, ensuring durability without adding unnecessary weight. However, the Glycerin 21's focus on plush comfort and stable transitions may enhance performance for dedicated runners compared to the more versatile yet basic performance of the Charged Assert 10.
Weight and Fit
The Brooks Women’s Glycerin 21 focuses on providing a plush fit, but specific weight details are not provided. It does, however, emphasize a soft internal fit that moves with the runner's stride. The Under Armour Women's Charged Assert 10 weighs 8.9 ounces, making it a lightweight option for those who prefer agility in their footwear. The Charged Assert 10 also features an EVA sockliner for soft step-in comfort. While both shoes aim for comfort, the Glycerin 21's emphasis on a flexible upper may offer a more accommodating fit for varied foot shapes, whereas the Charged Assert 10 appeals to those seeking a lighter shoe.
Durability and Longevity
Durability is a critical factor for running shoes, and both the Brooks Women’s Glycerin 21 and Under Armour Women's Charged Assert 10 have their strengths. The Glycerin 21 benefits from its nitrogen-infused cushioning, which not only provides comfort but also enhances durability, making it suitable for extensive running sessions. The Charged Assert 10 features a solid rubber outsole designed to cover high-impact zones, providing greater durability with less weight. Both shoes are built to last, but the Glycerin 21 may offer a longer lifespan due to its premium materials and construction aimed at serious runners.
Price Comparison
The Brooks Women’s Glycerin 21 is priced at $114.95, while the Under Armour Women's Charged Assert 10 is available for $54.95, making the latter about $60 cheaper. This price difference of approximately 52% could be a significant factor for budget-conscious shoppers. The Glycerin 21's higher price reflects its advanced cushioning technology and overall comfort features, which may justify the investment for dedicated runners. Conversely, the Charged Assert 10 offers a solid option for those looking for a reliable running shoe without breaking the bank.
Which should you buy?
Choosing between the Brooks Women’s Glycerin 21 and the Under Armour Women's Charged Assert 10 largely depends on your running needs and budget. If you prioritize supreme comfort, advanced cushioning, and a plush fit, the Glycerin 21 is a premier choice despite its higher price. However, if you're looking for a lightweight, budget-friendly option that still offers decent comfort and support, the Charged Assert 10 is a solid alternative. Both shoes cater to neutral runners, but the decision ultimately hinges on how much you are willing to invest in your footwear.

