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Brooks Women’s Adrenaline GTS 23 GTX Waterproof vs Under Armour Women's Charged Assert 9, Black/White, 8.5 US

Updated August 2026 — Brooks Women’s Adrenaline GTS 23 GTX Waterproof wins on comfort and support, Under Armour Women's Charged Assert 9, Black/White, 8.5 US wins on weight and breathability.

The Brooks Adrenaline GTS 23 GTX offers superior support and waterproof features, while the Under Armour Charged Assert 9 is more budget-friendly and lightweight.

Why Brooks Women’s Adrenaline GTS 23 GTX Waterproof is better

Support

Adrenaline GTS 23 GTX has advanced support features.

Waterproof

Adrenaline GTS 23 GTX offers waterproof protection.

Durability

Adrenaline GTS 23 GTX is built for long-term use.

Why Under Armour Women's Charged Assert 9, Black/White, 8.5 US is better

Price

Charged Assert 9 is significantly cheaper.

Weight

Charged Assert 9 is lighter and more agile.

Breathability

Charged Assert 9 has a more breathable upper.

Overall score

Brooks Women’s Adrenaline GTS 23 GTX Waterproof
85
Under Armour Women's Charged Assert 9, Black/White, 8.5 US
70

Specifications

SpecBrooks Women’s Adrenaline GTS 23 GTX WaterproofUnder Armour Women's Charged Assert 9, Black/White, 8.5 US
CushioningDNA LOFT v2Charged Cushioning
Upper MaterialGORE-TEXMesh
StabilityGuiderailsReinforced Overlays
WeightHeavierLighter
DesignVibrantClassic

Dimension comparison

Brooks Women’s Adrenaline GTS 23 GTX WaterproofUnder Armour Women's Charged Assert 9, Black/White, 8.5 US

Price Comparison

The Brooks Women’s Adrenaline GTS 23 GTX is priced at $165.00, whereas the Under Armour Women’s Charged Assert 9 is significantly more affordable at $57.95. This makes the Charged Assert 9 about 65% cheaper than the Adrenaline GTS 23 GTX. When considering budget constraints, the Charged Assert 9 offers a substantial saving for those who want a quality running shoe without breaking the bank. However, the higher price of the Adrenaline GTS 23 GTX reflects its advanced features and specialized design for serious runners.

Comfort and Fit

Comfort is a key factor when selecting running shoes, and both models aim to deliver an enjoyable experience for the wearer. The Adrenaline GTS 23 GTX features a new midsole with DNA LOFT v2 cushioning, designed to provide a smooth, soft ride. This model is also engineered with a unique Guiderails Holistic Support System that aligns the body in its natural motion path, catering to runners needing extra support. On the other hand, the Charged Assert 9 boasts a plush step-in feel due to foam padding around the ankle, coupled with a comfort sockliner that molds to the foot. This combination ensures an incredibly comfortable fit right out of the box, with no break-in period required.

Support and Stability

When it comes to support, the Brooks Adrenaline GTS 23 GTX is specifically designed for runners who require additional stability. Its Guiderails system helps control excess movement, making it an excellent choice for those with pronation issues. This model has received recognition as a certified PDAC A5500 Diabetic shoe and possesses the APMA Seal of Acceptance, indicating its focus on foot health. In contrast, the Under Armour Charged Assert 9 offers midfoot support through reinforced overlays but does not have the same level of specialized support as the Adrenaline GTS 23 GTX. This makes the Under Armour shoe more suitable for casual runners and walkers rather than those requiring extensive stabilization.

Breathability and Weather Resistance

Breathability is an essential feature for running shoes, and both models address this need but in different ways. The Charged Assert 9 is built with a lightweight mesh upper that enhances airflow, ensuring that feet stay cooler during runs and workouts. This makes it ideal for warm-weather activities. Conversely, the Adrenaline GTS 23 GTX integrates GORE-TEX Invisible Fit technology, which provides waterproof protection. This feature is particularly beneficial for runners who face varying weather conditions, allowing them to train without worrying about getting their feet wet. While the Brooks shoe prioritizes weather resistance, the Under Armour model focuses on breathability.

Weight and Agility

Weight can significantly affect running performance, and here the Charged Assert 9 shines. It is designed to be lightweight, which enhances agility and responsiveness. This characteristic is complemented by a flexible tread pattern on its rubber outsole, increasing traction and allowing for steady movement on various surfaces. In contrast, the Brooks Adrenaline GTS 23 GTX, while equipped with advanced cushioning and support, may feel a bit heavier due to its robust construction aimed at providing stability and waterproofing. Runners looking for a shoe that feels light and nimble may prefer the Under Armour option.

Durability and Longevity

Durability is a critical consideration for runners who want their shoes to withstand the rigors of training. The Brooks Adrenaline GTS 23 GTX is built with high-quality materials aimed at long-term use, making it a solid investment for regular runners. The GORE-TEX upper adds to its longevity by resisting wear from environmental elements. The Under Armour Charged Assert 9 features a Charged Cushioning midsole that is designed for responsiveness and durability, but its overall construction may not be as robust as that of the Adrenaline GTS 23 GTX. For avid runners or those who log significant mileage, the Brooks shoe may offer better longevity.

Style and Aesthetics

Style can be a deciding factor for many when choosing running shoes. The Brooks Adrenaline GTS 23 GTX is available in a striking Black/Knockout Pink/Aqua color scheme, appealing to those who prefer a vibrant look while running. Meanwhile, the Under Armour Charged Assert 9 features a more classic black and white design, making it versatile for various casual settings beyond running. While both shoes have their unique aesthetic appeals, the choice ultimately depends on personal style preferences.

Which should you buy?

Choosing between the Brooks Women’s Adrenaline GTS 23 GTX and the Under Armour Women’s Charged Assert 9 boils down to your specific needs and running habits. If you prioritize advanced support, waterproof capabilities, and are willing to invest in a higher-priced shoe, the Adrenaline GTS 23 GTX is the better option. On the other hand, if you are looking for a budget-friendly, lightweight shoe with good breathability and comfort for casual use, the Charged Assert 9 stands out as an excellent choice. Your decision should align with how you plan to use the shoes and what features matter most to you in your running experience.