The Ultimate Nike ReactX Rejuven8 Sizing Guide

The Nike ReactX Rejuven8 represents Nike's bold entry into the "foam clog" movement, delivering their answer to the futuristic comfort trend that's dominated recovery footwear. Launched as a dedicated recovery shoe, the Rejuven8 combines Nike's ReactX foam technology with a minimalist, slip-on silhouette designed for post-workout relaxation, casual lounging, and effortless everyday wear. Its sculptural, modern design has quickly captured attention as Nike's interpretation of comfort-first footwear.

Here's the critical challenge: this is a one-piece foam construction with no laces, no straps, and no adjustability. The size you order is the fit you get permanently. There's no cinching down if it's too loose or opening up if it's too tight.

For most people, we recommend taking your usual size (true to size) as the Rejuven8 runs generously. If you have genuinely narrow feet or prefer a very close, secure fit, sizing down half a size is worth considering. The shoe is intentionally roomy—that's part of its recovery-focused design philosophy.

Fit Analysis : Understanding Its "Recovery" Design

The Rejuven8's generous proportions make complete sense when you understand its purpose. As a recovery shoe, it's engineered to be non-restrictive, allowing your feet to decompress after workouts or long days. Think of it as the footwear equivalent of taking off tight dress shoes—immediate relief and freedom of movement.

The ReactX foam material provides substantial cushioning but maintains its shape permanently. Unlike knit fabrics that stretch and adapt, this one-piece molded construction stays exactly as formed. What you experience on day one is what you'll experience a year later. The foam might compress slightly underfoot with extensive use, but the upper structure and internal dimensions remain fixed.

The shape features specific characteristics: A wide base provides stability. Generous volume over the top accommodates various foot heights without pressure. The heel is open for easy slip-on access. Most importantly, the midfoot wraps slightly to cradle your foot—this sculptural contouring prevents excessive forward sliding despite the relaxed fit.

The footbed offers light anatomical shaping without aggressive arch support or restrictive contours. You're resting in the shoe rather than locked into it.

Our Sizing Recommendations by Foot Type

For Normal and Wide Feet

Stick with your regular size. The Rejuven8's generous construction provides adequate space without needing to size up. You'll get the intended comfort with room for your feet to relax without feeling constricted.

Even genuinely wide feet that often require sizing adjustments on other shoes typically find the Rejuven8 accommodates width naturally at standard sizing. The open design and flexible foam sides adapt to foot width without resistance.

For Narrow Feet

This is where personal preference determines your choice. At your normal size, narrow-footed wearers often experience noticeable space around the foot—not problematic, but definitely present.

If you're comfortable with a relaxed, roomy sensation, your regular size works fine. Many people with narrow feet actually appreciate this for a recovery shoe where precision fit isn't the priority.

However, if you prefer more contact and security, go down half a size. This brings the foam closer to your foot, reduces lateral movement, and creates better lockdown during walking. You'll still have adequate comfort, just with less excess space. Choose this option if you plan active casual wear rather than pure lounging.

Sizing Comparison: Rejuven8 vs Other Slip-On Foam Shoes

Nike ReactX Rejuven8 vs Yeezy Foam Runner

The sizing philosophy is completely opposite between these models. The Yeezy Foam Runner runs notoriously small—most people need at least one full size up from their usual measurement, sometimes even more. The Foam Runner's compact, narrow construction forces this dramatic adjustment.

For the Rejuven8, use your actual foot size—NOT your adjusted Foam Runner size. If you're genuinely a US 9 but wear US 10 in Foam Runners, order US 9 in the Rejuven8. Don't apply Foam Runner sizing logic here; they're fundamentally different fits.

Nike ReactX Rejuven8 vs Crocs Classic Clog

Both follow similar comfort-first philosophies with comparable internal space. Crocs pioneered the roomy foam clog concept, and the Rejuven8 follows this approach with more athletic styling and premium foam technology.

Take the same size in Rejuven8 as your Crocs. If US 9 works comfortably in Crocs Classic Clogs, US 9 should deliver similar fit in the Rejuven8. The main differences are aesthetic execution and material properties rather than actual dimensions.

Nike ReactX Rejuven8 vs Nike Air Max 95

This comparison illustrates the dramatic difference between performance sneakers and recovery footwear.

If you sized up on the Air Max 95 due to its snug construction (for example, wearing US 10 when you're truly US 9.5), return to your actual measurement for the Rejuven8. The AM95 requires adjustment due to its narrow fit; the Rejuven8's generous design doesn't.

Use your genuine foot size as the baseline here, not whatever compensated size you've settled on for tighter-fitting shoes.

The Half-Size Question

Half-size availability varies by colorway and market. Nike doesn't always produce foam recovery shoes in every half increment, particularly for certain releases or regions.

If you're normally between sizes (like US 9.5) and half sizes aren't available:

Size down to US 9 if you prefer precision, especially with narrower feet. The shoe will feel more secure with controlled space. Normal socks fit comfortably.

Size up to US 10 if you prioritize maximum comfort or have wider feet. This provides extra breathing room and accommodates thick socks. The trade-off is a looser, more slipper-like sensation.

For recovery and lounging, sizing up is typically safer. For active casual wear, sizing down prevents too much foot movement during walking.

FAQ - Frequently Asked Questions

Can you wear the Rejuven8 with socks?

Absolutely—the design accommodates various sock thicknesses. Many find the Rejuven8 most comfortable with socks, whether thin athletic styles or thick cushioned ones. The generous interior never feels cramped regardless of sock choice.

Sock selection can help fine-tune fit if you're between sizes. Thicker socks fill volume if the shoe feels slightly roomy; thin socks or barefoot wear works if you want more direct foam contact. The ReactX foam also feels pleasant against bare skin for poolside or summer wear.

Does the Rejuven8 stay secure despite the open design?

Yes, proper sizing ensures the shoe stays put surprisingly well. The sculptural design wraps around your midfoot and arch, creating natural retention that prevents excessive forward sliding or heel slip during normal walking.

Sizing too large defeats this engineered cradle effect—your foot will slide forward and feel unstable. This is why we emphasize standard sizing for most people rather than oversizing. Narrow-footed individuals who experience looseness at their regular size find that going down half significantly improves security.

How does the comfort compare to Crocs or Foam Runners?

ReactX foam offers different characteristics while serving similar purposes. It provides greater energy return and more responsive cushioning than Crocs' marshmallow-like foam. The feel is slightly firmer but still luxuriously soft, with better athletic performance properties.

Compared to Foam Runners, the Rejuven8 is more forgiving and immediately comfortable for wider feet. ReactX foam also maintains its properties better across temperature ranges—it doesn't become hard in cold weather like some EVA-based foams.

All three work excellently as recovery footwear; the choice comes down to aesthetic preference and specific fit needs.

Can you wear the Rejuven8 for workouts or running?

This is pure recovery and lifestyle footwear, not built for athletic activity. While ReactX comes from Nike's performance running technology, the Rejuven8's construction lacks the structure needed for gym workouts, running, or sports. The open heel and minimal upper support make it unsuitable for anything beyond casual use.

Use it for its intended purpose: post-workout recovery, lounging at home, casual errands, walking the dog, easy summer wear, or slipping on at the gym after training. It excels in these scenarios.

Final Verdict: Finding Your Perfect Rejuven8 Fit

Nike ReactX Rejuven8 sizing is refreshingly straightforward:

-Normal to wide feet: Your regular size delivers intended comfort
- Narrow feet preferring security: Half size down for closer contact
- Between sizes with no half-size available: Size down for precision, size up for maximum relaxation

Unlike technical shoes requiring complex sizing strategies, the Rejuven8 keeps it simple: your standard measurement works for most people, with straightforward adjustments for specific preferences or foot shapes.

Explore the futuristic colorways of the Nike ReactX Rejuven8 available from our trusted retail partners:

Shop ReactX Rejuven8 on Nike.com - Direct from Nike with the latest colorway releases and restocks

Browse Rejuven8 at Foot Locker - Good availability with in-store try-on options at select locations

Check Rejuven8 at JD Sports - UK/EU buyers get competitive pricing and regional exclusives

Explore Rejuven8 on StockX - Secondary market for sold-out colorways and limited releases

The Nike ReactX Rejuven8 typically retails for $140-160 USD / £130-150 GBP / €140-160 EUR, positioning it competitively against premium recovery footwear while offering Nike's signature foam technology and modern aesthetic.
For anyone seeking effortless comfort after workouts or elevated casual style without sacrificing ease, the Rejuven8 delivers—just make sure you nail the sizing.


Pictures via Fenom, Asos, Nike.