The Parisian fashion label Sézane, synonymous with the coveted "French girl style" and an undeniable Instagram phenomenon boasting 5.6 million followers, has captivated a global audience with its effortlessly chic and vintage-inspired designs. From its signature trench coats and elegant blouses to its charming basket bags, the brand has cultivated a cult following that includes high-profile celebrities like Taylor Swift, Kate Middleton, and Selena Gomez. However, behind the veneer of its aspirational aesthetic and rapid e-commerce success lies a pressing question regarding its environmental and social impact, as evidenced by its "Not Good Enough" rating from the rigorous sustainability assessment platform, Good On You. This evaluation, based on data published in February 2025, prompts a deeper examination of the brand’s practices and offers consumers a curated selection of alternatives that align more closely with robust ethical and sustainable standards.
The Rise of a Digital Fashion Empire: Sézane’s Ascent and Expanding Footprint
Sézane’s journey began modestly in 2013, from the bedroom of its founder, Morgane Sézalory. Her initial venture involved selling carefully curated secondhand clothes on eBay, a background that infused Sézane’s early collections with a distinct vintage sensibility. This foundational ethos, celebrating timelessness and quality, remains a core part of the brand’s identity today. Sézalory’s innovative spirit led her to establish France’s first entirely online fashion brand, a pioneering move that positioned Sézane at the forefront of the e-commerce revolution. This digital-first approach allowed Sézane to bypass traditional retail barriers, fostering direct engagement with customers and enabling rapid, organic growth.
The brand’s appeal quickly transcended its digital origins. Its social media presence became a masterclass in aspirational marketing, showcasing a lifestyle as much as a product. Influencers and celebrity endorsements amplified its reach, transforming individual items into viral sensations. The "Achille" cardigan, for example, reportedly sold over 30,000 times in the UK alone, a testament to the brand’s immense commercial power and consumer demand. This exponential growth, however, has not gone unnoticed by its dedicated fanbase. Recent discussions on platforms like Reddit reveal a growing sentiment among long-time Sézane customers regarding the increasing frequency of product drops, sparking concerns about the environmental implications of such high production volumes. As Sézane transitioned from an online-only venture to a global presence with 20 "apartment-style" boutiques and numerous pop-ups worldwide, the scale of its operations intensified, bringing its sustainability practices under closer scrutiny.
Good On You’s Assessment: Unpacking the "Not Good Enough" Rating
Good On You, an independent rating system dedicated to assessing fashion and beauty brands’ impact on people, the planet, and animals, employs a comprehensive methodology that scrutinizes various aspects of a brand’s supply chain and operational policies. For Sézane, the February 2025 assessment revealed a complex picture, highlighting areas where the brand demonstrates some commitment to responsibility, yet falls short in critical domains.
On the positive side, Sézane has made some discernible efforts. The brand reportedly utilizes a medium proportion of lower-impact materials in its collections, indicating an awareness of the environmental footprint associated with raw material sourcing. Furthermore, its design philosophy, rooted in creating durable, long-lasting pieces intended to be staples in a wardrobe, aligns with principles of reduced consumption and product longevity – a stark contrast to the disposable nature of true fast fashion. Sézane also has an animal welfare policy in place, addressing concerns related to animal-derived materials. Its status as a B Corp is another notable achievement, signifying a commitment to meeting high standards of verified performance, accountability, and transparency on factors from employee benefits and charitable giving to supply chain practices and input materials. This certification underscores Sézane’s intent to operate as a force for good.
However, the "Not Good Enough" rating primarily stems from significant gaps in the brand’s social and environmental transparency and practices, particularly concerning its vast supply chain. A critical area of concern is the absence of concrete evidence demonstrating that workers throughout its supply chain are paid a living wage. In an industry often plagued by exploitative labor practices, ensuring fair compensation is paramount. While Sézane states it has a code of conduct for workers, the lack of public disclosure of this document hinders external verification and transparency. For a brand of Sézane’s scale, influence, and purchasing power over its suppliers, implementing and transparently reporting responsible wage and labor practices is not just an expectation but a moral imperative.
Environmentally, Good On You analysts found no substantive indication that Sézane is actively working to meaningfully reduce or eliminate hazardous chemicals from its manufacturing processes. The fashion industry is a significant contributor to chemical pollution, impacting ecosystems and human health. Furthermore, there was insufficient evidence to suggest the brand is taking proactive measures to protect biodiversity within its supply chain, an increasingly critical issue given the impact of material sourcing and production on natural habitats. These omissions collectively contribute to the "Not Good Enough" rating, suggesting that while Sézane has taken initial steps, it has considerable work ahead to align its practices with truly comprehensive sustainability standards. The brand’s full directory page on Good On You provides further detailed insights into the specifics of this rating.
Broader Implications and Industry Context
Sézane’s rating reflects a broader challenge faced by many popular fashion brands operating at a significant scale: balancing commercial success and rapid expansion with genuine ethical and environmental responsibility. The rise of conscious consumerism means that customers are increasingly looking beyond aesthetics and brand narrative, demanding transparency and accountability regarding a product’s true impact. A "Not Good Enough" rating, especially for a brand with such a strong positive public image and B Corp status, serves as a crucial reminder that perceived sustainability and actual, verifiable practices can differ.
The B Corp certification, while a commendable achievement, is a foundational step, not an end goal. It signals a commitment to improvement and a willingness to be held accountable, but it does not automatically equate to a "Good" or "Great" rating on all specific sustainability metrics, particularly within a complex global supply chain. This distinction is vital for consumers to understand, preventing potential "greenwashing" where a brand’s positive affiliations might overshadow areas needing significant improvement.
The pressure on brands like Sézane extends beyond ethical considerations; it increasingly involves regulatory scrutiny and investor expectations. As environmental, social, and governance (ESG) factors become more central to business valuations, brands neglecting comprehensive sustainability risk reputational damage, diminished consumer trust, and financial penalties. Sézane’s situation underscores the need for continuous improvement and radical transparency across the entire value chain, from raw material sourcing to manufacturing and end-of-life considerations for garments.
Seeking Ethical Elegance: Top-Rated Alternatives to Sézane
For consumers who admire Sézane’s aesthetic but wish to align their purchasing power with brands demonstrating stronger commitments to ethical and sustainable practices, several highly-rated alternatives offer similar casual and cool designs without compromising on responsibility. These brands are rated "Good" or "Great" by Good On You, ensuring a higher standard of environmental protection, fair labor practices, and animal welfare.
Baukjen
This London-based womenswear brand exemplifies ethical and sustainable style, focusing on creating clothes that are both chic and responsibly produced. Baukjen prioritises lower-impact materials, including recycled fabrics, which significantly reduces the environmental footprint by limiting the use of chemicals, water, and wastewater during production. Their designs often mirror Sézane’s timeless appeal, offering versatile pieces for a modern wardrobe. Baukjen is available in sizes XS-L.
See the rating. Shop Baukjen. Shop Baukjen @ Immaculate Vegan.
Christy Dawn
Hailing from the US, Christy Dawn presents a minimalist showroom of vintage-inspired women’s clothing and footwear. What sets them apart is their dedication to local production and the exclusive use of surplus fabric, effectively rescuing materials from landfills and giving them a new life. This approach makes them a "Great" option for conscious consumers seeking unique, high-quality pieces with a story. Christy Dawn offers an inclusive range of standard sizes XS-XL, alongside Extended and Petite collections.
See the rating. Shop Christy Dawn.
Komodo
A UK brand with a global conscience, Komodo consistently places people and the planet at the forefront of its operations. Their menswear and womenswear collections feature a range of more responsible materials, including GOTS-certified organic cotton and hemp. Crucially, Komodo ensures that the majority of its suppliers provide a living wage to their workers, directly addressing a key concern identified in Sézane’s rating. Their styles offer a relaxed yet refined aesthetic. Most of the range is available in UK sizes 8-16.
See the rating. Shop Komodo. Shop Komodo @ Immaculate Vegan.
ABLE
This US-based clothing and accessories brand is built on a powerful social mission: empowering women who have faced extraordinary circumstances by providing them with living wage employment. ABLE’s commitment to slow fashion is evident in its thoughtful design, use of lower-impact materials, and practices like water and material reuse to minimise waste. They offer a lifetime guarantee on their products, underscoring their dedication to quality and longevity. ABLE’s pieces are not just an investment in a wardrobe but also a direct investment in women globally. The range is available in sizes 2XS-2XL.
See the rating. Shop ABLE.
OMNES
OMNES, a UK-based brand, is dedicated to changing how people shop, wear, and think about clothing. They focus on creating high-quality, more affordable womenswear with a strong emphasis on responsibility. Their mission is to encourage broader industry change by leading through example. OMNES offers contemporary, versatile styles that easily integrate into a chic, conscious wardrobe. Most items are available in sizes 6-20.
See the rating. Shop OMNES.
Facettes Studio
For those drawn to Sézane’s Parisian roots, Facettes Studio offers a truly French alternative with a strong sustainability commitment. This Parisian brand crafts "wardrobe essentials for the multifaceted woman" using exclusively upcycled materials. Notably, they have banned polyester and polyamide from their collections, focusing instead on suits and versatile separates. Facettes Studio also provides valuable repairs and alterations services, promoting the longevity of their garments. Find its clothes in sizes FR 34-44.
See the rating. Shop Facettes Studio.
Whimsy + Row
Born in 2014 from a passion for quality goods and responsible practices, US-based Whimsy + Row is a lifestyle brand known for its effortlessly stylish collections. They champion sustainability by using deadstock fabrics and executing short production runs, which drastically reduces waste. The brand also focuses on minimising packaging waste and conserving precious water resources. Their aesthetic often includes feminine silhouettes and relaxed pieces. Most products are available in XS-XL, with an extended sizing range up to 3XL.
See the rating. Shop Whimsy + Row. Shop Whimsy + Row @ Earthkind.
LA Relaxed
With a motto of "Simplicity, sustainability, style," LA Relaxed is a US brand that prioritises reducing its climate impact by incorporating renewable energy into its supply chain. They also utilise lower-impact materials such as organic cotton and TENCEL Lyocell, ensuring their pieces are kind to the planet. Their collection features comfortable yet chic everyday essentials. The collection is available in sizes XS-XL.
See the rating. Shop LA Relaxed.
Fanfare
Fanfare, a UK-based brand, offers a unique approach to sustainable fashion by transforming vintage clothes into one-of-a-kind pieces using recycled materials. This innovative model promotes circularity and significantly reduces textile waste. The brand reinforces its commitment to slow fashion through repair services, a take-back scheme, and even a lifetime guarantee on its products. Fanfare’s designs are distinct and make a bold statement for conscious dressing. Most items are available in UK sizes 4-18.
See the rating. Shop Fanfare. Shop Fanfare @ Earthkind.
ESSÄN
Founded in 2016 by Marre Muijs, ESSÄN emerged as a direct response to the fashion cycle’s overproduction and trend-chasing. This shoes and accessories brand eschews the traditional fashion calendar, instead offering a single, permanent collection of meticulously crafted pieces. ESSÄN limits its production runs and employs low-waste cutting techniques, prioritising thoughtful creation over mass consumption. Their focus on timeless design and quality makes them a true investment in sustainable style.
See the rating. Shop ESSÄN.
Reformation
LA-based Reformation has long been a leader in making "killer clothes that don’t kill the environment." The brand is transparent about its supply chain practices, ensuring that a proportion of its suppliers pay a living wage to their workers. Reformation also invests in training its suppliers to continuously improve working conditions, demonstrating a holistic approach to ethical production. Their popular dresses and contemporary pieces offer a blend of trend-conscious and sustainable style. Its range is available in sizes XS-3XL.
See the rating. Shop Reformation.
SeamsFriendly
SeamsFriendly distinguishes itself by creating beautiful, tailored pieces designed to fit all body types perfectly. The brand champions function and utility in its designs, utilising lower-impact materials like organic cotton and linen. A standout feature is its customisation option: shoppers can personalise neck styles, depths, sleeve lengths, garment lengths, fabrics, and more, ensuring a truly bespoke fit. This approach minimises returns and maximises satisfaction. The brand offers extensive custom sizing for womenswear (bust 26"-70", waist 19"-63", including petite, regular, and tall heights) and menswear (chest 34" to 76" and above). A kids’ range (bust: 18"-28", waist: 19"-26") is also available.
See the rating. Shop SeamsFriendly.
This updated article, which incorporates the Good On You rating published in February 2025, reflects the dynamic nature of sustainability assessments. Good On You’s editors frequently update articles and brand selections to ensure they remain current and feature brands with recent ratings and products. The feature image is via Baukjen, and all other images are via the brands mentioned. Good On You remains the world’s most comprehensive resource for ratings of fashion and beauty brands’ impact on people, the planet, and animals, with its directory serving as an invaluable tool for conscious consumers.
