Nnormal Kjerag Review: Kilian Jornet's Lightweight Trail Shoe Put to the Test

Introduction

The Nnormal Kjerag is the trail shoe from Kilian Jornet’s brand, developed in partnership with the Spanish company Camper. Priced around 170 pounds in the UK with free shipping, it sits at the top end of the trail shoe market, but the materials, construction, and durability story make a strong case for the price. We spent a wet, muddy 20K in Epping Forest putting it through its paces to see whether it earns a place in a regular rotation.

Specs and Construction

The numbers are distinctive. Stack height is 23.5mm at the heel and 17.5mm at the forefoot for a 6mm drop, and the shoe weighs a claimed 240 grams. There is no plate of any kind, no removable insole, and the midsole foam is sewn directly into the shoe, which should mean fewer blisters and hot spots and less weight.

The upper uses a Matrix construction of Kevlar and polyamide, described as very strong while staying very light. The outsole is a Vibram partnership using Mega Grip rubber with about 50 lugs at 3.5mm depth, a universal depth for most terrain short of deep bogs.

Who This Product Is For

Kilian positions the Kjerag as a shoe for everything from a vertical kilometre race up to 100-mile distances on trails. That makes it a genuine option for mountain racers, fast trail runners, and anyone who values ground feel over maximum cushioning.

First Impressions on the Trail

The first thing you notice when picking the shoe up is the weight: 240 grams is genuinely light for a trail shoe, and on the foot it feels nimble and almost unnoticeable. Early in the run the ride felt firm with not much bounce, more like a low, connected racing shoe than a modern max-stack trainer, though it softened up over the miles.

What We Liked

Three things stood out. First, the grip: the Vibram Mega Grip outsole with roughly 50 lugs, each with between six and eight edges, delivered extreme traction on everything tested, including wet forest trails and the North Downs, with no slipping at all. Only deep boggy ground would call for something more specialised.

Second, stability and lockdown. With your foot sitting directly on the trail-specific foam and no insole, the shoe feels simple, connected, and secure. Third, speed. The lightweight build makes the shoe feel like part of your body, and that lack of bulk should really pay off in shorter trail races like 5Ks, 10Ks, and half marathons.

Things to Consider Before Buying

There are a few honest trade-offs. The shoe is genuinely hard to get on: a semi-rigid heel counter makes entry awkward, though once on, the fit is fine. On roads, which it is not designed for, the ride feels harsh and you feel a lot of ground feedback, worth knowing if you need to run tarmac to reach your trails.

It is also not a max-cushion shoe, so rocks underfoot on smoother trails will be felt. On sizing, the fit runs large: sizing down a full size and a half proved slightly too small, and a full size down from usual would suit most people. At around 170 pounds it is top-end pricing, though the eco-focused manufacturing and claimed durability make it fair value for what you get. Kilian reportedly ran four races including UTMB and Hardrock in one pair, plus around 1,600K of testing in the same shoes, so longevity looks like a real selling point.

Buying Advice

If you want a lightweight, grippy, low-to-the-ground trail shoe for mountain racing and fast trail running, the Kjerag is an easy recommendation. If you prioritise plush cushioning, road comfort, or easy slip-on convenience, look elsewhere. Buying a full size down is the practical call for most runners.

Conclusion

The Nnormal Kjerag is a purposeful mountain racing shoe with exceptional grip, a connected low ride, and impressive durability claims, and after a wet and muddy debut it earned a lot more affection than expected. For runners who share Kilian’s taste for light, fast trail running, it belongs on a shortlist.