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More Sustainable Fashion Brand Offers This May 2025

Words: Partnerships Editor

Category: Top Picks

Published: 20 May 2025

Every week we publish offers and discounts from highly rated brands that have been assessed by our rigorous ratings system. Using our codes and links may earn us a commission—supporting the work we do. Learn more.

Good On You believes everyone should have access to more sustainable and affordable options when they need to buy something new. That’s why we share exclusive promotional offers from our network of more sustainable fashion brands, which have all been rated “Good” and “Great”. We update these offers every Wednesday to ensure you’re only seeing active promotions—this helps you find the best prices from some of our best-rated brands, and it gives us a means of highlighting and supporting their work, too.

Codes and offers from more sustainable fashion brands

BAM

Offers

BAM – Socks (UK)

Bamboo socks are a real treat for your feet. Super soft and incredibly comfy socks, with reinforced toe and heel. 30% off socks. (Only available in the UK.) (Ends: 31 MAY)

BAM – Yoga Pants And Leggings (UK)

Leggings perfect for workouts, running, cycling, and hitting the trail. Yoga pants so soft and comfy you’ll wear them all day. 20% off yoga pants and leggings. (Only available in the UK.) (Ends: 31 MAY)

UK-based BAM makes womenswear and menswear basics from bamboo, and rates “Good” for people, the planet, and animals. The brand traces most of its supply chain and also offers clothing recycling to consumers to help address end-of-life textile waste.

Find most items in sizes XS-L.

See the rating.

Sans Savon

Offers

Sans Savon – Site-wide (US, CA)

Microbiome friendly, biodegradable and deeply nourishing soap-free cleansers for hand and body. Better for you, your skin and the planet. Exclusive 10% off with code Spring10 (First order only. Only available in the US and Canada.) (Ends: 31 MAY)

Checkout code: Spring10

Sans Savon is the body and hand wash alternative to soap. Better for you, your skin, and the Earth.

See the rating,

Shop Sans Savon.

MATE the Label

Offers

MATE The Label – Site-wide

MATE is having their annual 30% off site-wide birthday sale from 5/16-6/2. No code needed. (Ends: 2 JUN)

MATE the Label creates clean essentials made with GOTS certified organic fabrics and lower-impact dyes. Its goal is to offer women everywhere a clean product that is just as beautiful as it is responsible. It is proudly female-founded and is predominately operated by women. This US brand also manufactures locally to reduce its carbon footprint.

Find the range in inclusive sizes XS-3XL.

See the rating.

Shop MATE the Label.

The Knotty Ones

Someone in clothing by The Knotty Ones.

Offers

The Knotty Ones – Sample Sale

The Knotty Ones secret sample sale features ever-so-slightly imperfect knits and one-of-a-kind production samples at a reduced price. Up to 60% off. (Ends: 2 JUN)

The Knotty Ones is a luxury knitwear label based in Brooklyn, New York.

See the rating.

Shop The Knotty Ones.

Shop The Knotty Ones @ Urbankissed.

Nui Organics

Someone with children dressed in tops and bottoms by Nui Organics.

Offers

Nui Organics – Women’s Merino Silk Rib Tanks

Merino Silk Rib tank, all-season 100% natural. Soft, flattering and always in rotation. Bundle and save 25% on 3 or more rib tanks. (Ends: 20 JUN)

Nui Organics – Merino Kids Socks

Merino wool socks for kids - thick and juicy Lounge Socks and all-year Nature Socks. 60% off with code SOCK60 (Ends: 18 JUN)

Checkout code: SOCK60

Nui Organics – Merino Baby Socks

Merino wool socks for babies in singles and 5-packs. 60% off with code SOCK60 (Ends: 18 JUN)

Checkout code: SOCK60

Nui Organics – Merino Women’s Socks

Merino wool socks for women - thick and juicy Lounge Socks and all year Nature Socks. 60% off with code SOCK60 (Ends: 18 JUN)

Checkout code: SOCK60

Nui Organics – Organic Cotton Kids

Organic cotton tees and shorts for kids. Up to 70% off. (Ends: 3 JUN)

Nui Organics – Organic Cotton Baby

Organic cotton tops, bottoms, and one-pieces for babies. Up to 70% off. (Ends: 3 JUN)

Nui Organics – Kids Merino Hoodies And Crews

Designed with movement in mind, because childhood is an adventure, 100% merino hoodies and crews. Bundle discount increases as quantity increases up to a max 50%. (Ends: 4 JUN)

Nui Organics was founded on a culture of consciousness, community, and intentional design. It creates high-quality, lower-impact Merino wool and organic clothing for families in timeless styles.

Find sizes for children aged 0-12 years, and XS-2XL for adults.

See the rating.

Shop Nui Organics.

ZEROBARRACENTO

Offers

ZEROBARRACENTO – Site-wide

At ZEROBARRACENTO collections are developed according to a zero-waste pattern making, that allows to use the fabric in its entirety, with no waste. Exclusive 30% off with code 30XGOODONYOU (Sale items excluded.) (Ends: 4 JUN)

Checkout code: 30XGOODONYOU

ZEROBARRACENTO is an Italian brand that creates zero-waste clothes that celebrate the personality of those who wear it.

You can find most pieces in sizes S-L.

See the rating.

Shop ZEROBARRACENTO.

Oobi

little girl wearing blue and pink flower dress by oobi

Offers

Oobi – Shop All

Oobi kids clothes are made with 100% cotton, which is soft on sensitive skin and ensures comfort when worn. Exclusive 15% off with code GOOD15 (First order only.) (Ends: 5 JUN)

Checkout code: GOOD15

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.

See the rating.

Shop Oobi pre loved @ Retykle.

Mila.Vert

Offers

Mila.Vert – Site-wide

As Mila.Vert prepares for new summer collections, a selection of their pieces will soon be discontinued. 25% off site-wide. (Ends: 17 JUN)

Mila.Vert makes chic, minimalist clothes that have a distinctly modern feel. The Slovenia-based brand produces clothes in small batches based on a pre-order system to minimise waste and help to avoid the ethical and environmental issues that the fashion industry represents.

Find the garments in sizes XS-XL.

See the rating.

Shop Mila.Vert.

Shop Mila.Vert @ Immaculate Vegan.

The ANJELMS Project

Offers

The ANJELMS Project – Site-wide

The ANJELMS Project is an Australian based brand creating unique and expressive clothing using more sustainable practices. Exclusive 10% off with code ANJELMS10 (First order only.) (Ends: 10 JUN)

Checkout code: ANJELMS10

The ANJELMS Project is an Australian clothing brand on a mission to help improve the lives of its makers. It celebrates traditional techniques, creating clothes that are naturally dyed and hand-loomed in India using more sustainable practices and limiting production to minimise waste.

Find most garments in XS-2XL.

See the rating.

Shop the ANJELMS Project.

No Nasties

Offers

No Nasties – Women’s Bottoms

Tailored, but not tight. Breezy, but not shapeless- made from organic cotton and linen. Exclusive 10% off with code NONASTIES10 (Ends: 21 JUN)

Checkout code: NONASTIES10

No Nasties – Site-wide

Waffle bath towels: crafted with organic waffle, naturally lightweight and incredibly soft. Exclusive 10% off with code NONASTIES10 (Ends: 16 JUN)

Checkout code: NONASTIES10

No Nasties – Site-wide

These zero-waste classic polos are knit from yarn into the exact shape of the garment, eliminating fabric waste. Exclusive 10% off with code NONASTIES10 (Ends: 11 JUN)

Checkout code: NONASTIES10

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.

See the rating.

Shop No Nasties.

SeamsFriendly

Offers

SeamsFriendly – Site-wide

Handcrafted tailor-made clothing for women, men and kids of all body types, sizes and heights. Exclusive 15% off with code SF-GY15 (Sale items excluded.) (Ends: 17 JUN)

Checkout code: SF-GY15

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 (bust size range 26"-70", waist size range 19"-63", including petite, regular, and tall heights) to ensure you always find the perfect fit, and there's a kids range (bust: 18"-28", waist: 19"-26") available too.

See the rating.

Shop SeamsFriendly.

Mila.Vert

Offers

Mila.Vert – Site-wide

As Mila.Vert prepares for new summer collections, a selection of their pieces will soon be discontinued. 25% off site-wide. (Ends: 17 JUN)

Mila.Vert makes chic, minimalist clothes that have a distinctly modern feel. The Slovenia-based brand produces clothes in small batches based on a pre-order system to minimise waste and help to avoid the ethical and environmental issues that the fashion industry represents.

Find the garments in sizes XS-XL.

See the rating.

Shop Mila.Vert.

Shop Mila.Vert @ Immaculate Vegan.

Editor's note

Feature image via Unsplash, other images via brands mentioned. Good On You publishes the world's most comprehensive ratings of fashion and beauty brands’ impact on people, the planet, and animals. Use our directory to search thousands of rated brands.

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