Zen Running Future One First Run Review: A Firm, Sustainable Daily Trainer

Introduction

The Zen Running Future One is the latest sustainable performance shoe from a brand on a mission to make running shoes that do a little less damage to the planet than the petrochemical-heavy favorites most of us rotate through. It follows the ZR01, and after an initial hour-long 10K run, the early picture is clear: this is a firm, stable, snappy trainer that rewards quick feet and will not suit everyone.

Quick Specs and Construction

The Future One has a 33mm heel stack, 24mm in the forefoot, giving a 9mm drop. It weighs 11.2 oz (317g) in a UK men’s 8.5 test shoe and is priced at £180.

The midsole uses a brand-new foam made from 60% bio content derived from rapeseed oil, and it includes enzymes that activate and accelerate degradation once the shoe ends up in landfill, rather than sitting there for thousands of years. Zen claims 64% rebound, an improvement over the ZR01, with only 7% breakdown in performance over 500km.

Up top there is a full booty-style knitted upper made from eucalyptus-based Tencel Lyocell, giving a sock-like fit with flyer-wire details for added hold. Beyond a heel counter and minimal bio-based TPU overlays, there is not much structure. The knit feels a little tighter than the ZR01, and two pull tabs help you slide the shoes on, which is genuinely useful if you have high insteps. Inside, a castor bean-based sock liner adds extra flex and rebound, while the outsole gets generous rubber coverage across the forefoot and key heel impact areas.

Fit: Snug Booty Fit, Sizing Up Worth Considering

I ran in a UK 8.5, my regular running shoe size in most brands. Initially the booty fit feels close and hugging, bordering on cramped, though that is partly my very high insteps. Once on the run, they loosen off and become quite comfortable, holding the foot with a nice wrap.

There is not a huge amount of room behind the toe knuckle, so wider feet may be a concern. Toe box length is generous, and the knitted upper flexes well across the top. If you like a roomier fit, going half a size up seems sensible. If you prefer a dialed-in, snug booty fit that holds the foot securely, true to size should work.

Ride Impressions: Firm, Stable, and Snappy

The first thing you notice is firmness. This is a super firm shoe, firmer and stiffer than past Zen Running shoes, and it harks back to the firmer early sustainable trainers rather than following the recent trend toward softer, more cushioned eco shoes like the Veja Condor 3 or the Hoka Impact.

This is a shoe where you need to pick your feet up fairly quickly. There is a lot of road coming through, and it can feel a little sloppy at easy paces. The payoff is a wide, stable base that offers a genuinely reliable platform to land on from midfoot all the way back into the heels, even on mild off-road sections. You do not get the sink-and-return spring of some competitors; the Future One is all about stiffness and response.

By the end of the 10K, the firmness was starting to make itself felt. Compared with modern daily trainers with soft, high, protective stacks, this sits at the other end of the spectrum. It is not forgiving and does not allow lazy feet. If you enjoy an old-school, firm, ground-contact feel, that is exactly what it delivers.

Fit and On-Foot Comfort

On the foot, the booty fit is snug and very wrapping, and it loosens into a nicely held, wrapped comfort once moving. There is a reasonable disappearing feel once you get going, even if it is not the most comfortable shoe to step into initially.

One issue surfaced late in the run: some heel slipping developed and rubbed the backs of my heels. Adjusting the lockdown may fix this, and it is something to keep an eye on over further miles.

First Run Verdict

These are very early thoughts, and Zen says there is a running-in period, with the midsole softening and livening after a bunch of miles. If it does soften, it should make the shoe more accessible to more runners. For now, you need to enjoy a firmer, stiffer, more responsive ride.

Compared with other recent sustainable shoes, it is not as cushioned as the Veja Condor 3, not as punchy as the Hoka Impact, and rides a little more traditional, but the stability is really good. At £180, though, it faces stiff competition in the neutral daily trainer space from shoes like the Speed 4, Mach 6, and Novablast 4, many of which cost the same or less and do a really good job.

Conclusion

The Future One is a stable, responsive, eco-forward trainer with a snug sock-like upper that will appeal to runners who like firm, old-school rides and fast foot turnover. If you want cushioned, springy propulsion, you did not quite get that here, though the promised running-in period may change things. We will report back after more miles.