Reducing environmental impacts from garments through best practice garment use and care, using the example of a Merino wool sweater

Lisbeth Løvbak Berg on 19. April 2021

Stephen G. Weidemann, Leo Briggs, Quan V. Nguyen, Simon J. Clarke, Kirsi Laitala and Ingun G. Klepp

Abstract

Purpose

Garment production and use generate substantial environmental impacts, and the care and use are key determinants of cradle-to-grave impacts. The present study investigated the potential to reduce environmental impacts by applying best practices for garment care combined with increased garment use. A wool sweater is used as an example because wool garments have particular attributes that favour reduced environmental impacts in the use phase.

Methods

A cradle-to-grave life cycle assessment (LCA) was used to compare six plausible best and worst-case practice scenarios for use and care of a wool sweater, relative to current practices. These focussed on options available to consumers to reduce impacts, including reduced washing frequency, use of more efficient washing machines, reduced use of machine clothing dryers, garment reuse by multiple users, and increasing number of garment wears before disposal. A sixth scenario combined all options. Worst practices took the worst plausible alternative for each option investigated. Impacts were reported per wear in Western Europe for climate change, fossil energy demand, water stress and freshwater consumption.

Results and discussion

Washing less frequently reduced impacts by between 4 and 20%, while using more efficient washing machines at capacity reduced impacts by 1 to 6%, depending on the impact category. Reduced use of machine dryer reduced impacts by < 5% across all indicators. Reusing garments by multiple users increased life span and reduced impacts by 25–28% across all indicators. Increasing wears from 109 to 400 per garment lifespan had the largest effect, decreasing impacts by 60% to 68% depending on the impact category. Best practice care, where garment use was maximised and care practices focussed on the minimum practical requirements, resulted in a ~ 75% reduction in impacts across all indicators. Unsurprisingly, worst-case scenarios increased impacts dramatically: using the garment once before disposal increased GHG impacts over 100 times.

Conclusions

Wool sweaters have potential for long life and low environmental impact in use, but there are substantial differences between the best, current and worst-case scenarios. Detailed information about garment care and lifespans is needed to understand and reduce environmental impacts. Opportunities exist for consumers to rapidly and dramatically reduce these impacts. The fashion industry can facilitate this through garment design and marketing that promotes and enables long wear life and minimal care.

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

Increasing repair of household appliances, mobile phones and clothing: Experiences from consumers and the repair industry

ingridha on 1. December 2020

Kirsi Laitala, Ingun Grimstad Klepp, Vilde Haugrønning, Harald Throne-Holst & Pål Strandbakken

Abstract

Increasing product lifespans is one of the most effective environmental strategies and therefore repair is a part of the circular economy approach that aims to keep products and materials longer in use. This article explores drivers and barriers for repair from consumers’ and commercial repair actors view-points, in order to understand how the repair rates of household appliances, mobile phones and clothing could be increased.

The study is based on a consumer survey of 1196 respondents in Norway, and 15 qualitative interviews with actors in the commercial repair industry working with repairs of household consumer goods. A surprisingly high share of repairs was conducted by consumers themselves. The main barrier is the consistently low price of new products, and often of poor quality, which contributes to low profitability in repair work for businesses and low motivation from consumers. Furthermore, access to competent personnel is a major challenge for the repair industry, a need which is expected to increase in the coming years.

Both the industry and consumers agree that better quality of products is a starting point for increased product lifespans, and this will also increase the motivation and the number of profitable repairs. These results have political implications on how to promote longer product lifespans through repair such as increased utilization and knowledge of consumers’ complaint and warranty rights.

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

Global differences in consumer practices affect clothing lifespans

ingridha on 24. November 2020

Kirsi Laitala & Ingun Grimstad Klepp

Abstract

Most studies of clothing and related habits are carried out within a country. However, apparel production and sales are a highly globalized industry, with many of the same large chains operating worldwide. It is thus quite possible that the use of the same mass-produced clothing differs between various geographical areas. Based on a practice theoretical approach, we have studied differences in consumption, use and disposal of clothes in different countries that may affect the lifespan of apparel.

The paper is based on an international survey in five countries with large apparel markets: China, Germany, Japan, UK and the USA. 200 respondents from each country answered to a comprehensive web-based survey on their wardrobe content. We found differences in practices that could affect the lifespans of clothing in these five countries. At the same time, we find many similarities. For clothing acquisition, buying new items dominates in all the five markets, and washing machines contribute to the main chore of keeping clothes clean. Home production and second-hand clothes constitute a very small part of clothing consumption in all five countries. Many respondents showed low sewing skills, and repair activities were done irregularly. Thus, many of the challenges to increasing the lifespans of clothing are similar for all the five countries. At the same time, there are significant differences. These differences open up for the possibility to learn «best practice» by studying the countries and transferring knowledge between regions. When defining use phase in LCA and other sustainability tools, it must be taken into account that despite the fact that clothing is a global industry, consumption is part of local practice.

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

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

ingridha on 3. November 2020

Kirsi Laitala and Ingun Grimstad Klepp

Abstract

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).

Laundry Care Regimes: Do the Practices of Keeping Clothes Clean Have Different Environmental Impacts Based on the Fibre Content?

ingridha on 12. September 2020

Kirsi Laitala, Ingun Grimstad Klepp, Roy Kettlewell & Stephen Wiedemann

Abstract

Clothing maintenance is necessary for keeping clothing and textiles functional and socially acceptable, but it has environmental consequences due to the use of energy, water and chemicals. This article discusses whether clothes made of different materials are cleaned in different ways and have different environmental impacts. It fills a knowledge gap needed in environmental assessments that evaluate the impacts based on the function of a garment by giving detailed information on the use phase. The article is based on a quantitative wardrobe survey and qualitative laundry diary data from China, Germany, Japan, the UK and the USA.

The largest potential for environmental improvement exists in reducing laundering frequency and in the selection of washing and drying processes, and through a transition to fibres that are washed less frequently, such as wool. Adopting best practice garment care would give larger benefits in countries like the US where the consumption values were the highest, mainly due to extensive use of clothes dryers and less efficient washing machines combined with frequent cleaning. These variations should be considered in environmental assessments of clothing and when forming sustainability policies. The results indicate the benefits of focusing future environmental work on consumer habits and culture and not only technologies.

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

Clothing Lifespans: What Should Be Measured and How

ingridha on 2. August 2020

Ingun Grimstad Klepp, Kirsi Laitala & Stephen Wiedemann

Abstract

Increasing the use of each product, most often called longer lifespans, is an effective environmental strategy. This article discusses how garment lifespans can be described in order to be measured and compared. It answers two sub-questions: (1) what to measure (units), and (2) how to measure (methods). We introduce and define terms related to clothing lifespans and contribute to discussions about an appropriate functional unit for garments in life cycle assessments (LCA) and other environmental accounting tools. We use a global wardrobe survey to exemplify the units and methods.

Clothing lifespans can be described and measured in years, the number of wears, cleaning cycles, and users. All have an independent value that show different and central aspects of clothing lifespans. A functional unit for LCAs should emphasise both the number of wears for all users as well as the service lifespan in years. Number of wears is the best measure for regular clothing, while number of years is most suited for occasion wear, because it is important to account for the need of more garments to cover all the relevant occasions during a specified time period. It is possible to study lifespan via carefully constructed surveys, providing key data relating to actual garment use.

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

Environmental impacts associated with the production, use, and end-of-life of a woollen garment

ingridha on 25. May 2020

S.G. Wiedemann, L. Biggs, B. Nebel, K. Bauch, K. Laitala, I.G. Klepp, P.G. Swan and K. Watson.

Abstract

Purpose

The textiles industry is a substantial contributor to environmental impacts through the production, processing, use, and end-of-life of garments. Wool is a high value, natural, and renewable fibre that is used to produce a wide range of garments, from active leisure wear to formal wear, and represents a small segment of the global fashion industry. Woollen garments are produced by long, global value chains extending from the production of ‘greasy’ wool on sheep farms, through processing to garment make-up, retail, consumer use, and end-of-life. To date, there have been limited life cycle assessment (LCA) studies on the environmental impacts of the full supply chain or use phase of garments, with the majority of wool LCA studies focusing on a segment of the supply chain. This study aimed to address this knowledge gap via a cradle-to-grave LCA of a woollen garment.

Methods

This study investigated greenhouse gas (GHG) emissions, fossil fuel energy, and water stress associated with the production, use, and end-of-life of a lightweight woollen sweater (300-g wool), together with inventory results for freshwater consumption and land occupation. Primary datasets were used for the wool production and wool processing stages, while primary datasets relating to consumer garment use were supplemented with literature data. Impacts were calculated and reported per garment wear event.

Results and discussion

Impacts per wear were 0.17 (± 0.02) kg CO2-e GHG, 0.88 (± 0.18) MJ fossil energy, and 0.96 (± 0.42) H2O-e water stress. Fossil fuel energy was dominated by wool processing, with substantial contributions of energy also arising from retail and garment care. Greenhouse gas emissions from wool production (farming) contributed the highest proportion of impacts, followed by lower contributions from processing and garment care. Contributions to water stress varied less across the supply chain, with major contributions arising from production, processing, and garment use.

Conclusions

Opportunities to improve the efficiency of production, processing, and garment care exist, which could also reduce resource use and impacts from wool. However, the number of garment wear events and length of garment lifetime was found to be the most influential factor in determining garment impacts. This indicated that consumers have the largest capacity to influence the sustainability of their woollen garments by maximising the active garment lifespan which will reduce overall impacts.

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

Wardrobe sizes and clothing lifespans

Lisbeth Løvbak Berg on 19. September 2019

Ingun Grimstad Klepp, Kirsi Laitala and Vilde Haugrønning

Abstract

It is easy to assume that a large wardrobe is characterized by excessive clothing and high acquisition, with little use of each garment and thus a big environmental impact. However, it is also possible to think the opposite; that the large wardrobe is a result of clothes remaining in use for a long time, that disposal happens rarely, while acquisition can be normal or even low. Whatever the reason, in a large wardrobe it is more likely that clothes become old before the technical life expires. This is because many of the garments are seldom used. Small wardrobes are often presented as favourable for both people and the environment, and as part of an ecological-friendly lifestyle, but we know little about the interaction between wardrobe sizes, longevity and the environmental impact.

In this paper, we investigate this relationship based on survey material from five countries; China, Germany, Japan, UK and the USA. We find that consumers with large wardrobes use their clothes longer, but consumers with small wardrobes use their clothes more often before they are disposed. We conclude that a good utilization of resources is possible with both large and small wardrobes, but in different ways. As we work towards more sustainable clothing consumption, we need to approach consumers differently, in order to give constructive advice to all.

This is a conference article from the 3rdPLATE 2019 Conference. Click here to find the full conference proceedings including this article (depositonce.tu-berlin.de).

KRUS final report: Enhancing local value chains in Norway

ingridha on 9. September 2019

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)

A Louse in Court: Norwegian Knitted Sweaters with ‘Lus’ on Big-Time Criminals

Lisbeth Løvbak Berg on 25. July 2019

Ingun Grimstad Klepp

Introduction

Early one morning in 2008 I was sitting in make-up for a Norwegian television show and felt the trained hands of the make-up smooth out my face with paint. It wasn’t the first time I’d been there. With a population of 5 million there are not many clothing researchers to choose between in Norway, and with plenty of weather and outdoor activities, clothes are important. Questions such as how to dress children for physical activities outdoors are equally relevant every autumn and before every winter vacation and every Easter, when Norwegians go to their cabins, and the ideal is to spend as much time as possible outdoors. I have talked about the choice between wool and synthetic fibres and also about traditional Norwegian knitwear, but this time the subject was somewhat different.


The Norwegian Islamist Arfan Bhattis stood, as the first person in Norway to be accused of violating a new terror clause in the Penal Code. The striking thing for the Norwegian press was that he appeared in court in a Norwegian knitted sweater, a so-called lusekofte [lit: lice jacket], and he wasn’t the first. Before him, the accused in the biggest robbery in Norwegian history and the accused in the most discussed triple homicide had dressed in the lusekofte in court.

You can find this essay appeared in the book Fashion Crimes: Dressing for Deviance, edited by Joanne Turney, here (bloomsburyfashioncentral.com).