What Affects Garment Lifespans? International Clothing Practices Based on a Wardrobe Survey in China, Germany, Japan, the UK, and the USA

Kirsi Laitala and Ingun Grimstad Klepp


Increasing the length of clothing lifespans is crucial for reducing the total environmental impacts. This article discusses which factors contribute to the length of garment lifespans by studying how long garments are used, how many times they are worn, and by how many users. The analysis is based on quantitative wardrobe survey data from China, Germany, Japan, the UK, and the USA. Variables were divided into four blocks related respectively to the garment, user, garment use, and clothing practices, and used in two hierarchical multiple regressions and two binary logistic regressions.

The models explain between 11% and 43% of the variation in clothing lifespans. The garment use block was most indicative for the number of wears, while garment related properties contribute most to variation in the number of users. For lifespans measured in years, all four aspects were almost equally important. Some aspects that affect the lifespans of clothing cannot be easily changed (e.g., the consumer’s income, nationality, and age) but they can be used to identify where different measures can have the largest benefits. Several of the other conditions that affect lifespans can be changed (e.g., garment price and attitudes towards fashion) through quality management, marketing strategies, information, and improved consumer policies.

Click here to read the full article (mdpi.com).

KRUS final report: Enhancing local value chains in Norway

Ingun Grimstad Klepp, Tone Skårdal Tobiasson, Vilde Haugrønning, Gunnar Vittersø, Lise Grøva, Torhild Kvingedal, Ingvild Espelien & Elin Kubberød

From its initiation in 2015 to the end in 2019, KRUS had two goals: to improve the market for and the value of Norwegian wool, and survey the opportunities for local production in a move towards a goal of sustainability in the fashion sector. On a larger scale, KRUS has looked at how we can re-establish an understanding of the connection between the raw material and the finished product within the textile industry and among consumers. It is critical to understand this connection, both to ensure quality products and to reach the market potential for Norwegian wool.

To restore the understanding of “where clothes come from” is also at the heart of challenges currently facing the textile industry. The consumption and production of textiles faces major challenges and changes in the future. Today the industry is characterized by low control and little knowledge, while growth in quantity, environmental impact, as well as stress on animals and humans is high. KRUS has contributed to the debate on sustainable clothing by focusing on local value-chains and locally produced apparel.

The focus on Norwegian wool and the specific qualities of the different breeds has played an essential role for Norwegian textile tradition and dress culture, and a better understanding of this has been essential to the project. An important challenge for Norwegian wool is that it has not been marketed with any kind of label of origin. Private actors have thus entered the field and developed their own private labels for Norwegian wool. In addition, there are few products on the market containing Norwegian wool beyond hand-knitting yarn, which means that availability has been limited.

Throughout the project, we have seen a shift, especially for older sheep breeds, which have posed a special challenge. Their wool is central in keeping Norwegian handicrafts alive, but the quality on some of the wool types has been declining. For others, the challenge is that much of the wool is not taken care of, and constitutes a waste problem. Through breeding-projects, work collaboration, looking closely at labelling systems and business models, KRUS has addressed these challenges.

Click here to read the full report (oda.oslomet.no)

Consumption Studies: The force of the ordinary

Ingun Grimstad Klepp and Kirsi Laitala


Consumer research deals with the acquisition, use and disposal of goods and services. Our workplace, SIFO, the National Institute for Consumer Research in Norway, dates back to the 1930s, when home economics and testing of products were predominant. The work aimed at guiding consumers, at that time called housewives, through the ‘jungle’ of novel consumer goods. More recently, SIFO’s work combines social science and textile technology to study the social and technical aspects of consumption.

In this chapter, we ask: how can knowledge of clothing consumption contribute to the work on sustainable fashion? We will answer the question through examples from interdisciplinary projects on textiles at SIFO, as well as from consumer research. However, we will not give an overview of consumer research on clothes and sustainability. But first, an admission: fashion – the topic of this book – operates according to a different logic from our field of work. We would have posed the question differently: how can consumer research – and all the other fields of expertise covered in this book –contribute to more sustainable patterns of clothes production and consumption? Therefore, we also have to include a discussion of the concept of fashion.

This article is Chapter 12 in the book Routledge Handbook of Sustainability and Fashion, edited by Kate Fletcher and Mathilda Tham that you can find here (tandfonline.com).