Under Armour Women's Charged Surge 4 Running Shoe (Style X21K)

In this review the Under Armour Women's Charged Surge 4 is presented as a practical, everyday running shoe for women who need a balance of cushioning and flexibility. The single biggest reason to buy is the combination of the Charged Cushioning midsole and a breathable mesh upper, which together deliver a comfortable, responsive ride without feeling heavy. The shoe aims to be light and breathable while still offering support for neutral runners and those who spend long hours on their feet.

Key Features

• Breathable mesh upper: Keeps the foot cool during runs and daily wear while synthetic overlays add structure where support is needed.
• Charged Cushioning midsole: Provides responsive, durable cushioning that isolates impact and returns energy for a livelier step.
• Deluxe Comfort System sockliner: Molds to the foot for improved step-in comfort and helps reduce pressure points during long outings.
• Enhanced ankle collar cushioning: Offers extra comfort around the heel and reduces irritation for all-day wear.
• Durable rubber outsole: Delivers reliable traction and flexible toe-off without adding unnecessary weight.

Who It's For

The Charged Surge 4 is best suited to neutral runners who want a shoe that blends flexibility with everyday cushioning, and to active shoppers who need comfortable footwear for work, gym sessions, or casual runs. Its light construction and supportive overlays make it appropriate for people who prioritize breathability and steady cushioning over maximal stability.

Runners who require aggressive motion control or a custom orthotic fit should look elsewhere, as this model is built for neutral mechanics and moderate arch support rather than overpronation correction or highly personalized inserts.

Pros & Cons

Pros

• Comfortable, responsive feel from the Charged Cushioning midsole for all-day wear.
• Breathable mesh upper with overlays provides a good mix of airflow and structure.
• Deluxe Comfort System sockliner and padded collar improve step-in comfort and heel fit.
• Durable rubber outsole gives dependable traction and natural flexibility at toe-off.

Cons

• Sizing reports are mixed; some customers find them slightly small so trying on or sizing up may be necessary.
• Not designed for heavy stability needs or specialized orthotics.

Specifications

Our Verdict

The Under Armour Charged Surge 4 is a solid choice for neutral runners and anyone who needs a comfortable, breathable shoe for everyday training and work. It delivers good value through a responsive midsole, supportive upper, and comfortable sockliner, though shoppers should be mindful of inconsistent sizing and avoid this model if they need heavy stability features.

Frequently Asked Questions

Are these shoes good for long runs?
Yes, the Charged Cushioning midsole and supportive upper make them suitable for longer training runs, especially for runners who prefer a balance of cushioning and flexibility.

Do they run true to size?
Customer feedback is mixed; some find them true to size while others report they run small, so trying them on or considering a half size up is advisable.

Can I use custom insoles with these?
They can accommodate some aftermarket insoles, but the shoe is designed with the Deluxe Comfort System sockliner in place, so very thick custom orthotics may reduce fit comfort.