More Sustainable Fashion Brand Offers This May 2026

Underprotection is a Danish brand combining ethics and aesthetics, creating underwear, loungewear, and swimwear from lower-impact materials like organic cotton. All of its packaging, paper, and polybags are either recycled or biodegradable, and it only works with certified factories as it believes “fair working conditions and fair wages are human rights”. Underprotection exists to celebrate women of all kinds, and its goal is to make them feel as beautiful and comfortable as possible.

You can find the full range in XS-XL.

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Shop Underprotection.

Another leader when it comes to responsible fashion, No Nasties makes simple and stylish clothing from Fairtrade organic cotton in India where it is actively working to grow the ethical consumer market.

Find styles in sizes 2XS-3XL.

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Shop No Nasties.

POPLINEN is an LA brand that specialises in more sustainably made basics using plant-based materials.

Find items in sizes XS-L.

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Shop POPLINEN.

Dressarte Paris makes custom clothes using luxurious, lower impact materials that often come from surplus sources.

Its products are made-to-order, and you can choose from existing sizes or enter your own measurements.

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Shop Dressarte Paris.

Canadian brand tentree plants ten trees for every item purchased to help regenerate ecosystems and provide planting jobs in communities around the world, and has already planted over 65 million trees. All tentree’s products are created with an Earth-first approach, meaning they’re made in fair, safe working conditions, and constructed using lower-impact and recycled materials.

tentree’s clothes are typically available from XS-XL.

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Shop tentree.

SukkhaCitta is a certified B corp brand from Indonesia creating timeless modern heirlooms leveraging heritage crafts.

Find the range in sizes XS-L.

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Shop SukkhaCitta.

Oobi is an Australian girl’s fashion, swimwear, homewares, and lifestyle brand. In addition to creating stylish clothes for children, the brand makes sure it uses low-impact non-toxic dyes throughout its range. It also uses no animal products and opts for sea freight to transport products to reduce its climate impact.

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Shop Oobi.

Shop Oobi pre loved @ Retykle.

SeamsFriendly creates beautiful tailored pieces for all body types. It focuses on function and utility in its designs and uses lower-impact materials like organic cotton and linen. What’s more, shoppers can customise the brand’s designs to their exact preferences—change the neck style, depth, sleeve length, garment length, fabric, and more on anything in its array of clothes.

The brand’s product sizing is customisable (for womenswear: bust size range 26″-70″, waist size range 19″-63″, including petite, regular, and tall heights; and for menswear: chest size 34″ to 76″ and above with free custom sizing) to ensure you always find the perfect fit.  There’s a kids range (bust: 18″-28″, waist: 19″-26″) available too.

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Shop SeamsFriendly.