The Mizuno Neo Zen 2 is a lightweight, high-stack neutral daily trainer built around a nitrogen-infused ENERZY NXT midsole and a snug, sock-like knit upper. In Grey/White, it's designed for runners who want a fun, comfortable daily trainer for easy runs and steady mileage, without a plate slowing things down.
Quick Technical Specifications
| Category | Neutral Daily Trainer |
| Support | Neutral |
| Surface | Road |
| Weight | 241g / 8.5oz (Men's US9, manufacturer stated) |
| Heel Drop | 6mm |
| Stack Height | 40mm heel / 34mm forefoot |
| Midsole | Nitrogen-infused ENERZY NXT (EVA), non-plated |
| Upper | Sock-like engineered knit with semi-detached tongue |
| Colour | Grey/White |
| Ride Feel | Light, high-stack, moderately rockered |
| Best Use | Daily training, easy runs, long runs |
| Price Category | Premium daily trainer |
Product Overview
The Neo Zen 2 sits between Mizuno's traditional Wave Rider and its max-stack Neo Vista in the brand's lineup a lightweight, high-stack daily trainer without a plate. Version 2 changes the midsole compound from the supercritical TPU used in the original Neo Zen to a nitrogen-infused EVA ENERZY NXT foam, which trades some outright bounce for a firmer, more stable ride at the same 40mm heel stack height.
The upper has also been reworked, with a semi-detached tongue that allows for a more adjustable, secure fit while keeping the sock-like knit texture that made the original Neo Zen distinctive. Mizuno has also added heel collar padding to help avoid Achilles irritation, and the outsole uses an exposed midsole design in places to save weight.
Who benefits? Runners with narrow-to-average feet who like a snug, sock-like fit and a high-stack, lightweight ride for daily and long-run mileage. It suits runners looking for a versatile trainer that can handle easy runs through to moderately paced efforts. It's not the shoe for runners who want maximum energy return that crowd may prefer the original Neo Zen's TPU foam or a dedicated racing shoe nor for wide-footed runners, who may find the snug knit upper restrictive.
Technology Explained
Nitrogen-Infused ENERZY NXT (EVA)
What it is: Mizuno's nitrogen-infused EVA foam, used as a full-length, non-plated midsole in the Neo Zen 2.
How it works: Injecting nitrogen into the EVA compound during production creates a lighter, more cushioned foam than standard EVA, though it is firmer and less energetic than the supercritical TPU used in the original Neo Zen.
Why it matters: This change trades some of the original's lively bounce for a more stable, predictable ride a deliberate shift for runners who want consistency over excitement.
Who benefits: Runners who want a light, high-stack shoe for steady daily mileage rather than an especially bouncy or race-oriented ride.
Smooth Speed Assist Geometry
What it is: Mizuno's midsole shaping designed to smooth the transition from landing to toe-off.
How it works: A moderate rocker profile built into the midsole encourages a smooth roll through the gait cycle, reducing the effort needed to move through each stride.
Why it matters: Without a plate to guide the transition, the geometry itself does the work of keeping the ride smooth and efficient at the shoe's tall 40mm stack height.
Who benefits: Runners who want a smooth, easy-rolling ride without the firmer feel a plate can sometimes add.
Ride Experience
Landing: Firm but well-cushioned, with strong shock absorption from the tall 40mm stack.
Transition: Smooth, aided by the moderate rocker geometry.
Toe Off: Efficient, though without a plate to add propulsion, this relies on the foam and geometry alone.
Responsiveness: Moderate firmer and less bouncy than the original Neo Zen's TPU foam, but still lively for an EVA compound.
Comfort: Strong, particularly for narrow-to-average feet thanks to the snug, sock-like upper.
Stability: Good for a non-plated shoe, though without the structural guidance a plate provides.
Ground Feel: Limited given the tall stack, despite the shoe's light weight.
Cadence: Versatile comfortable at easy paces with reasonable upside for faster efforts.
Fit & Sizing
| Length | True to size; some runners size up for a roomier fit. |
| Width | Snug, sock-like fit best suited to narrow-to-average feet. |
| Heel Fit | Secure, with added heel collar padding to prevent Achilles irritation. |
| Toe Box | Moderate room, laterally biased midfoot construction. |
Ideal Runner
- Narrow-to-Average Feet: The sock-like knit upper fits snugly and securely.
- Neutral Runners: Built as a neutral trainer without pronation-control features.
- Daily Training and Long Runs: Comfortable, lightweight cushioning for regular mileage.
Who might want to look elsewhere: wide-footed runners may find the snug upper restrictive; runners chasing maximum bounce may prefer the original Neo Zen's TPU foam or a dedicated performance trainer.
Performance Ratings
| Comfort | |
| Cushioning | |
| Stability | |
| Responsiveness | |
| Daily Training | |
| Long Runs | |
| Overall Value | |
Comparison Table
| Model | Weight | Drop | Best For |
|---|
| Mizuno Neo Zen 2 | 241g | 6mm | Light, high-stack, non-plated daily trainer |
| ASICS Novablast 5 | ~254g | 8mm | Bouncier, taller-stack daily trainer |
| Mizuno Wave Rider 30 | ~265g | 8mm | Plated, more structured Mizuno daily trainer |
Neo Zen 2 vs Wave Rider 30: The Neo Zen 2 is lighter and lower drop, without a plate a more foam-driven ride. The Wave Rider 30 uses a full-length Wave Plate for a more structured, guided feel at a similar stack height.
Key Features
