Organic cotton is grown without synthetic fertilisers or pesticides. These substances are known to degrade soil over time, affect local water quality, and expose farming communities to harmful substances. Organic farming takes a different approach: working with the land for healthy soils, clean water, and a balanced ecosystem.

Regenerative cotton is grown using farming practices that aim to actively restore the land. Where conventional farming is known to deplete soils over time, regenerative practices work to rebuild them through cover crops, reduced tillage, and careful management of water and biodiversity. Healthy soils hold water more effectively, support a richer ecosystem, and have a greater capacity to store carbon. Regenerative farming looks at the whole system: the soil beneath it, the water moving through it, the life living in it. Our regenerative cotton comes from Regenagri-certified farms, but as none of our direct suppliers are yet Regenagri certified, our regenerative-cotton products don't currently carry product-level certification.

Post-consumer recycled cotton is made from textiles that have already had a full life: produced, worn, and discarded. Used denim and other cotton textiles are collected, processed, and shredded into fibre, then re-spun into new yarn. Compared to producing virgin cotton fibre, recycling can reduce the water and chemical inputs required, while helping to divert used clothing from waste streams.

Since 2019, we have been using post-consumer recycled cotton in our denim.

TENCEL™ Lyocell fibres are made by Lenzing AG from certified or controlled wood sources. The closed-loop production process recovers and reuses over 99% of the water and solvents involved. TENCEL™ Lyocell is soft, durable and biodegradable.

TENCEL™ is a trademark of Lenzing AG.

Linen comes from the flax plant. Flax grows on natural rainfall and needs few or no synthetic pesticides, and after harvesting, the stems are left in the field to ret naturally - softened by rain and dew until the fibres can be separated. Most linen is grown in Europe, in France and Belgium.

Some of our stretch denim uses T400 EcoMade by Lycra - a stretch fibre made from 50% post-consumer recycled polyester and 18% plant-based materials, replacing virgin fossil-fuel inputs with recycled and renewable alternatives.

Hemp is a fast-growing crop that needs no synthetic pesticides and requires little to no irrigation. It produces a naturally strong, durable fibre - one of the reasons we use it in pieces built to last.

To make recycled polyester, PET plastic bottles are collected, shredded and spun into yarn. We strive to have all the recycled polyester we use certified to the Global Recycled Standard (GRS), which verifies the recycled content and tracks it from source to final product, and confirms the supply chain has met social, environmental and chemical requirements. We prefer not using polyester in our products, even if it's recycled. Recycled polyester is therefore only a very small portion of our material use.

There are a lot of different ways to create a lower-impact wash on your denim. Every style has its own wash recipe to get to the ideal "worn-in" look. We use technologies like laser, ozone and e-flow machines, and substitute harmful chemicals for better, low-impact ones - and we keep working to bring more of these into our wash recipes.

Water-saving isn't limited to washing: in our dyeing processes too, our suppliers limit water consumption, and take care that the wastewater coming out of these processes is cleaned, filtered and recycled as much as possible. The lowest-impact option of all is our undyed denim.

EIM stands for Environmental Impact Measuring, a tool developed by Jeanologia, a company that builds machines and technology for the fabric and garment finishing industry. EIM lets us calculate the water, energy, chemical and worker impact of our products in detail.

Since 2016 we've replaced the leather patches with a non leather alternative. Since 2020 we've used the Viridis patch from Panama Trimmings: a partly bio-based polyurethane (PU) patch made from 48% corn polyols, 26% cotton and 26% conventional PU. Alongside being a vegan substitute for leather patches, they also carry a lower environmental and worker impact.

We use Ecoverde recycled polyester sewing thread by Coats. It performs the same as conventional, non-recycled thread, with the benefit that no new virgin resources are needed to produce the yarn. Coats, a global leader in sewing threads, continues to develop the Ecoverde range as part of their own environmental programme.

Almost all of our Pure Goods are fully vegan: free of any animal content. You can check which products these are by reading the "Certifications & Sustainability" info on that product's page. Kuyichi has been opposed to using fur from the beginning, which is why we're listed on both the Fur Free Retailer list and Bontvrijlijst.

We've been a Fair Wear Foundation member since 2020. Fair Wear is an independent organisation that helps garment brands identify, prevent and remediate labour rights risks in their supply chains, working from their own "Code of Labour Practice" - eight internationally agreed labour standards, including no child labour and reasonable working hours. Membership isn't a certification of our factories; it's a framework we use to track and improve our own due diligence, year after year. Fair Wear reviews that progress annually through a Brand Performance Check, and the results of this check are made public on our and Fair Wear's website.

By signing the Transparency Pledge, we committed to publishing an updated supplier list on our site at least twice a year: full name, address, parent company, type of products and worker numbers. We've also listed our suppliers on Open Supply Hub, an online database of publicly available supply chain data, built from brands' own lists. The goal: help brands, NGOs, and other brands sharing the same facilities collaborate to improve working conditions there.