Nike Women's Reactx Infinity RN 4 Shoes - Plush Support for Runs

In this review of the Nike Women's Reactx Infinity RN 4 Shoes the bottom line is clear: these are cushioned road trainers for runners who want a soft, supportive ride with a secure fit. The most compelling reason to buy is the new ReactX foam, which gives noticeably more support and energy return so runs feel springier and less fatiguing. The shoe's waterproof membrane and revamped Flyknit upper add comfort and weather protection, making it a versatile option for daily miles and recovery runs.

Key Features

• ReactX foam: Delivers a softer platform with increased support and about +13% energy return compared to previous React foam, which helps preserve energy over longer runs.
• Revamped Flyknit upper: Offers a snug, breathable fit with an internal Flyknit fit band that locks the midfoot in place for stability during transitions.
• Wider toe box: Provides more room for natural toe splay and reduces pressure on the forefoot during long sessions.
• Waterproof membrane: Keeps feet dry in wet conditions without sacrificing the cushioned ride or fit.
• Cushioned collar and tab: Improve heel comfort and make the shoe easy to pull on while maintaining a secure, snug feeling.

Who It's For

The Reactx Infinity RN 4 is best for road runners who prioritize cushioning and support-especially those who want a plush, energy-returning midsole for daily training or recovery runs. It suits runners who appreciate a stable platform and extra underfoot comfort and those who want weather protection for damp routes.

Runners who need a very narrow fit or those who prefer a minimal, low-drop racing shoe should look elsewhere; some customers report the sizing runs small, so people who are between sizes may need to size up for a consistent fit.

Pros & Cons

Pros

• Excellent underfoot comfort from the new ReactX foam, making long runs less punishing.
• Secure midfoot support from the internal Flyknit fit band and a stable platform.
• Waterproof membrane adds everyday usability in wet weather without degrading comfort.
• Wider toe box and cushioned collar increase overall foot comfort and reduce irritation.

Cons

• Sizing appears inconsistent for some users; several customers find the shoe runs very small and may require ordering a half or full size up.
• Heavier cushioning and support make it less suited to runners who prefer lightweight, fast-paced race shoes.

Specifications

Our Verdict

The Nike Women's Reactx Infinity RN 4 is a strong choice for runners seeking maximum cushioning, added support, and reliable comfort on everyday road runs. Its ReactX foam and Flyknit fit band deliver a secure, bouncy ride and the waterproof membrane boosts usability. It offers solid value for those who prioritize comfort and stability, though buyers should consider sizing up if between sizes.

Frequently Asked Questions

Do these shoes run true to size?
Some customers report they run very small, so consider ordering a half or full size up if you are between sizes.

Are they suitable for wet weather?
Yes, this version includes a waterproof membrane that helps keep feet dry during wet runs.

Are these shoes good for long runs?
The increased cushioning and energy return from ReactX foam make them well suited to long, comfortable training runs and recovery days.