Inov-8 Trailfly Review: A Comfortable, Versatile Trail Shoe That Finally Gets the Fit Right

Introduction

Inov-8 has been making steady changes to its running shoe lineup, and the latest Trailfly might be the clearest sign of that progress. After roughly 60 miles of testing across a wide mix of terrain, from rocky compacted paths to tarmac and loose gravel fire roads, this shoe has built a strong case as one of the most comfortable and versatile trail shoes the brand has produced.

The short version: the new anatomical upper fits brilliantly, the Powerflow Pro midsole strikes a satisfying balance between cushioning and ground connection, and the Graphene Grip outsole shows no visible wear yet. It scores a solid 24 out of 30 across price, comfort and performance, and durability.

Key Specs and Construction

The Trailfly retails in the UK for £130. A UK 8 pair weighs 313g, and the shoe runs a 6mm heel offset with a 29mm stack height at the heel and 23mm under the forefoot. It comes in three colorways for men and women, including an unusual ivory option.

The upper is where the biggest changes show up. Inov-8 has reshaped the shoe around the natural contours of the foot: secure in the heel, wrapped through the midfoot, and wider toward the toes. It is available in two width options, and even the standard fit offers generous room and volume in the toe box. A padded gusseted tongue, a soft flexible ankle collar and heel cup, and well-placed structural overlays running from heel to toe box round out a clean, simple design. The toe overlays are doubled up for extra protection from a solid toe bumper.

Midsole cushioning comes from Inov-8’s Powerflow Pro foam, paired with a flexible Meta Shank rock plate for underfoot protection against sharp rocks and tree roots. The outsole uses a 4mm multi-directional lug pattern built for rocky, compacted dry trails, coated in Inov-8’s Graphene Grip rubber, a material the brand has worked with for years thanks to its durability, with a new 2024 blend claimed to improve wet-condition grip.

Who This Shoe Is For

The Trailfly suits runners who want a comfortable, roomy, all-round trail shoe rather than a deeply cushioned or carbon-plated racer. If you value flexibility at the midfoot and toe-off, a secure but breathable upper, and reliable grip on rocky and compacted trails, this is a strong candidate.

Main Strengths

The fit is the headline story. The new anatomical shape holds the heel well, locks down the midfoot, and leaves plenty of wiggle room for toes to splay under impact. The padded gusseted tongue is a big step up from the thin, under-padded tongues Inov-8 used to rely on, which caused discomfort when laces pulled tight over long distances. This one stays comfortable at any distance, and the ankle collar no longer feels stiff or abrasive. No rubbing or irritation appeared across the full test period, and the shoe has felt like a comfortable pair of slippers from the first run.

Midsole performance is equally convincing. Powerflow Pro foam is not deeply cushioned, but it hits a genuine sweet spot between comfort and connection to the trail. Combined with a flexible midsole, the shoe feels nimble and responsive while staying planted and stable on technical ground. It also soaks up sections of tarmac with ease, which is a tricky combination for a trail shoe to pull off.

Outsole grip has been good on all tested terrain: rocky trails, compacted paths, tarmac, and loose gravel fire roads or tow paths. After 60 miles there is no early wear at the upper’s flex point, no lifting or peeling on the overlays, and zero wear on the Graphene rubber outsole, a reassuring sign given past durability issues with some models in the brand’s lineup.

Things to Consider Before Buying

The Powerflow Pro foam is fairly dense when you push into it, which makes the shoe feel slightly heavier and a touch bottom-heavy in hand. That said, it never felt heavy or unbalanced while actually running. The 4mm lugs also mean this is not a mud shoe; it would likely struggle in deep, heavy mud where deeper lugs are needed.

Styling is subjective, but the light blue and dark blue colorway is fairly plain, and the ivory option would not stay clean for long on muddy UK trails. The gray, black, and red option arguably looks the strongest of the three.

How It Scores

Price: 8/10. £130 is still a serious outlay, but in today’s running shoe market a comfortable, versatile trail shoe at this price is genuinely reasonable.

Comfort and Performance: 8/10. Comfortable upper, great fit, and a midsole that balances cushioning, protection, and flexibility. A slightly lighter midsole might have earned a nine.

Durability: 8/10. Solid signs of longevity at the 60-mile mark, with zero outsole wear and no upper damage.

Total: 24/30.

How It Compares

The new anatomical fit feels similar to the Altra Lone Peak in terms of upper feel, though the Trailfly keeps a 6mm heel offset rather than going zero-drop. The midsole’s level of comfort and protection also sits close to the Saucony Peregrine 13.

Buying Advice

If you are shopping for a versatile, comfortable trail shoe with an excellent fit, generous toe box volume, and a good balance of cushioning, protection, and ground feel, the Trailfly deserves a close look. It handles technical rocky sections, mixed terrain, and road connectors without complaint, and early durability signs are strong.

For runners who regularly face deep mud, a shoe with deeper lugs would serve you better. Everyone else testing rocky or compacted trails will likely find this the best all-round trail shoe Inov-8 has produced to date.

Conclusion

The Inov-8 Trailfly delivers where it counts: a genuinely comfortable anatomical upper, a well-balanced Powerflow Pro midsole, flexible handling on technical trails, and a durable Graphene Grip outsole with no visible wear after 60 miles. A 24/30 score reflects a shoe that does nearly everything well, with only midsole weight, mud capability, and styling holding it back. If comfort and versatility top your trail shoe wishlist, this one is easy to recommend.