MUD Jeans

Slim Lassen | O3 Blue

Cruelty-Free Ethically Made Natural Organic Sustainable Up-cycled / Recycled Vegan
Vintage-inspired skinny fit

The classic five-pocket O3 Blue Slim Lassen Jeans by MUD Jeans have a skinny fit, tapered leg, mid waist and zip fly.

Made from 23% post-consumer recycled cotton, 75% virgin organic cotton and 2% elastane, these babies have been ethically manufactured in Tunisia, satisfying strict environmental criteria along the entire textile supply chain. No leather label means they're also 100% vegan and cruelty-free.

Fast fact: Compared to industry standards, these jeans save up to 5,500 litres of water!

Make 4 interest‐free payments of $57.25 fortnightly with Afterpay More info

Delivery Charges

This item is in the Standard shipping group.

Shipping Notes

  • Sizes in stock in our Sydney warehouse typically ship within 2 business days
  • Sizes not in stock locally will be ordered in from The Netherlands and typically ship within 3 - 6 business days

Can be returned unworn, unmarked and in original packaging with all tags attached, within 30 days of purchase for exchange (e.g. different size or colour, if available) or refund for store credit for the full purchase price, less shipping, if applicable.

Slim Lassen is also available in Strong BlueStone Black and Pure Blue.

  • All measurements are in centimetres and indicate circumference. 
28 75.4 86.8 56.8 36 32
29 77.8 89.2 58 36.6 32.6
30 80 91.4 59.2 37.2 33.2
31 82.4 93.8 60.4 37.8 33.8
32 84.6 96 61.6 38.4 34.4
33 87 98.4 62.8 39 35
34 89.4 100.8 64 39.6 35.6
36 91.6 103 66.4 40.8 36.8

This is a general size guide and all measurements may differ slightly between each brand. 

For all enquiries and fit recommendations, please and we'll be happy to help.


28 71.0 XS
30 76.0 S
31 78.5
32 81.0 >M
33 83.5
34 86.0 L
36 91.0 XL
38 97.0  


32 81.5 Regular
34 86.5 Long
>36 89.5 Tall

  • 23% recycled denim
  • 5% certified organic cotton
  • 2% elastane

The recycled denim for these jeans comes from Royo in Spain. The jeans have been treated with a laser and ozone technique.

Organic means the cotton used for these jeans was grown without the use of chemicals - better for the environment and better for the cotton farmers.

The O3 Blue Slim Lassen contains 23% post-consumer recycled denim.

MUD's recycling partner, Recovertex, and mill, Royo, are able to combine state of the art technology and craftsmanship to produce the brand's circular denim fabrics. Cradle 2 Cradle certified dyes are used. Environmental impacts are minimised through the use of innovative techniques such as E-flow, laser and ozone, helping to save water, eliminate chemicals and improve the working conditions of the people in the MUD Jeans factories. 

Compared to industry standards, these jeans save up to 5,500 litres of water!

Wash inside out in cold or warm water (max. 30ºC). Hang to dry. Warm iron if required.

Research has shown that the most significant environmental impact of a pair of jeans is the 'use' phase (i.e. wearing and washing). To minimise this impact, take care of your jeans consciously - try to wash them as infrequently as possible and always wait until you have a full load.

We put together a few hints and tips on reducing the environmental impact of your jeans.

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