MUD Jeans Knowledge Centre

For all students out there: improve your circular skillset

Get educated

To make sure your jeans only consist of environmentally-friendly materials, we partnered up with some independent organizations.

Are you a student, teacher or just generally interested in spreading the word about MUD? You’re at the right place. Discover all resources for different ages below.

Recycled Cotton

Our jeans consist of up to 40% post-consumer recycled cotton, which is the highest percentage out there. Recycled post-consumer denim is our favourite material as it allows us to lower our use of virgin materials and in so doing, save water, energy and protect biodiversity. The aim to make our jeans 100% from postconsumer recycled cotton. Imagine the positive impact we can achieve then!

Our jeans are made from environmentally friendly materials; namely recycled and organic cotton. Cotton is a natural fibre, and therefore better for your body than materials that consist of blended fabrics. It’s very breathable, comfortable and hypoallergenic.

GRS certified

All recycled material is GRS certified. The GRS (Global Recycle Standard) is a full product standard that sets requirements of recycled content, chain of custody, social and environmental practices and chemical restrictions. By being GRS certified we ensure that the recycled components of our jeans are safe for our customers and the planet.

Supply Chain Game

Elementary School, 6-12 years

Are you in elementary school or know someone that is? Discover our supply chain game in 'De Wereld Van Kleding' textbook and find out playfully how we use old, jeans to create new jeans. Click here to download the textbook.

In circular design, simplicity is key. There are two main materials that go into every single one of our fabrics: organic cotton and recycled cotton.

Organic Cotton

Organic cotton is grown without pesticides, insecticides, herbicides or whichever -cides are out there. The plants are non GMO, the ground it’s grown on is toxic free and is given time to recover in between harvests. In short, it’s better for your skin and the planet. Our denim consists of 60-75% organic cotton depending on the style, which is supplemented with recycled cotton.

GOTS certified

Since we want the best organic cotton out there, GOTS is the ultimate certified material. The Global Organic Textile Standard ( GOTS) is an internationally recognized organic textile standard. All the virgin cotton that we use to make our jeans is GOTS certified. This way we can ensure that the cotton we use has been harvested with the highest environmental and social standards.


We not only use organic cotton but we also triple check that it is in the jeans you purchase. The Organic Cotton Standard (OCS) verifies and tracks the organic material in the final product. All of our fabrics are OCS certified.

Synthetic Fibres

Student Kit

Natural fibres like cotton are biodegradable and hence will leave no traces when returning to nature. Synthetic fibres like Polyester and Elastane are meant to last. Forever. Just like plastic bottles, they are petroleum based and, on top of that, shed microplastic fibres when being washed.

That’s why we advocate for rigid denim, but everyone needs a little stretch sometimes – we get that. Currently our stretch jeans contain a max of 2% elastane and we use stitching yarn with a polyester core for extra strength. By retaining synthetic content to under 4% we keep the jeans recyclable. To minimise our synthetic use even further we’re currently running tests on cellulose based stitching yarn and biodegradable elastane alternatives.

High School, 13-18 years

Are you currently in High School, looking to give a presentation about sustainability and the circular economy? Look no further, we prepared a comprehensive kit with all necessary information and resources. Follow the link to view and download the full student kit.

Sustainable Fashion Course

University, 19-25 years

Help build your CV with MUD jeans and become a sustainable change-maker. Complete a short online course with MUD Jeans, world-class universities and industry experts and become an expert in the world of sustainable fashion.

Circular Q&A

High School +, 12-99 years

Currently writing a paper or thesis and have a specific question to ask? Join our monthly Circular Q&A and ask our CEO Bert van Son or our CSR Officer Lea Landsberg all things circular.

Curious what other people ask?

Watch the recordings of our Circular Q&A

June, 2022

October, 2021

August, 2021

July, 2021

June, 2021

May, 2021

April, 2021

March, 2021

Still got questions?

Send an email to

Paper and printed labels

To make sure our jeans can be recycled after use, we replaced the usual leather patch on jeans with a printed label. This results in the jeans consisting of one material only (monomaterial) and therefore facilitates recycling. Positive side effect: No animals are harmed in the production of our denim.

FCS certified

Our paper labels are FCS certified, which ensures us that the forests used to make the paper we used are managed in a way to preserve biodiversity as well as benefit the lives of local people and workers.

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