Durability is clearly our reason for being. At NNormal, we firmly believe that the longer we use our sports equipment, the less impact it has on the environment. The longer the life, the lower the consumption and emissions. For this reason, we conducted a study to determine how many kilometres our footwear lasts and to prove that durability is essential to reducing our footprint.

Durability test: Kjerag

We’ve conducted a study based on a sample of 511 runners of all levels from around the world. Here’s what we’ve found: your Kjerag should last 1,350 km before it’s completely worn out or before its lifecycle is over.

To reach this conclusion, runners provided us with data regarding their weight, the kilometres they ran with their Kjerag shoes, the terrain they used them on, and the level of wear on their shoes, which was measured using our durability scale: Thanks to this scale, we were able to link the wear of each person's shoes to the kilometres covered and, consequently, predict the average lifespan of Kjerag shoes. A new approach to measuring environmental impact

What’s the point of calculating the emissions generated by manufacturing a pair of shoes without knowing how many kilometres the shoes will last?

At NNormal, we believe that durability should be included in the equation when calculating the environmental impact of sports equipment. That’s why we want to promote this methodology.

During the past season, we calculated that the emissions from our Kjerag and Tomir shoes were 7.5 kg CO2e per pair. Considering the average of 1,350 kilometres that our consumers run with their Kjerags, we have significant data that these shoes generate only 5.5 kg of CO2 per 1,000 kilometres. How long do your shoes have lasted?

“Thinking about the carbon footprint of a shoe per kilometre, rather than just the total carbon cost, makes sense. We look at how carbon builds up in the shoe over time and use, not just at the moment of its manufacture. This helps us determine which shoes are better for the planet, taking into account their durability and longevity. This can also motivate companies to design shoes that are better for our planet in the long term.” - Brianna Rita Pagán (Deputy Manager at NASA Goddard Earth Sciences Center Data and Information)