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Best High Street Sustainable Fashion Brands (UK & USA)

Author: Stylist and brand team at Tellar

Date: 2025

The Tellar Fashion Hub is the UK's Largest, 100% Free, Fully searchable, Fashion Library.

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1. Arket (UK/EU/USA)

  • Focuses on circular production, recycled fabrics, and transparency reports.

  • Great for: Minimalist tailoring, outerwear, everyday basics.

  • Offers traceable fibres and organic certifications.

2. Everlane (USA/UK Shipping)

  • Known for its “Radical Transparency” policy.

  • Great for: Workwear staples, premium basics, eco-denim.

  • Partner factories audited for fair labour.

3. COS (UK & USA)

  • Part of H&M Group, but leading the brand’s sustainable innovations.

  • Great for: Elevated essentials, structured silhouettes, recycled wool and organic cotton blends.

  • COS Resell promotes circular fashion.

📎 Learn more: Does COS sizing run small or large?

4. People Tree (UK)

  • A pioneer of fair-trade fashion and sustainable fibres since the 1990s.

  • Great for: Feminine prints, dresses, organic loungewear.

  • 100% GOTS-certified organic cotton and responsible dye processes.

💼 Best Designer Sustainable Fashion Brands

1. Stella McCartney (UK)

  • A leader in cruelty-free, sustainable luxury.

  • Uses Mylo™ (mushroom leather), organic cotton, and zero-deforestation policies.

  • Great for: Statement tailoring, eco-conscious partywear, and premium wardrobe staples.

2. Mara Hoffman (USA)

  • Emphasises circularity, regenerative fibres, and transparent supply chains.

  • Great for: Feminine dresses, bold colours, occasionwear with purpose.

3. Gabriela Hearst (USA)

  • Luxury label focused on low-impact production and eliminating plastic from its supply chain.

  • Great for: Cashmere suits, sustainable leather, ready-to-wear collections.

🧵 Styling Advice: Making Sustainable Fashion Work for You

🔁 Think Versatility

Choose timeless pieces that you can mix and match. Neutral tones and trans-seasonal fabrics like organic cotton, TENCEL™, and wool blends allow for styling flexibility.

♻️ Build a Capsule Wardrobe

Create a work-to-weekend rotation that includes:

  • One well-fitted blazer

  • Two pairs of sustainable jeans or trousers

  • Three to four tops in breathable fabrics

  • One statement coat or jacket

📎 Explore:

The Ultimate Guide to Smart Casual Blazers for Women’s Body Types

The Ultimate Guide to Women’s Tuxedo Suits

👖 Invest in Sustainable Denim

Look for:

  • Low water-use dyeing processes

  • Ozone washing

  • Recycled or organic cotton blends

📎 Find your perfect fit:

The Ultimate Guide: Flattering Jeans for Every Body Shape

The Ultimate Guide to Jeans for Petite Women

📏 How Tellar.co.uk Supports Sustainable Fashion

Tellar.co.uk is the UK’s leading real-time fashion sizing platform. By helping shoppers find their correct size the first time, Tellar reduces the need for returns, which in turn:

  • Lowers carbon emissions

  • Reduces packaging waste

  • Decreases overproduction

Tellar supports over 1,500 brands, including COS, Arket, Reiss, Mango, Everlane, and many more.

✅ How It Works:

  1. Measure once – using your bust, waist, hip, or your existing brand size.

  2. Use the Store Size Lookup Tool to get your precise size in any brand.

  3. Shop with confidence – no guesswork, fewer returns, better fitting purchases.

  4. Always free, no downloads needed – works in-browserInstruction on Posts

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➡️ Create your free Tellar profile

➡️ Use the Store Size Lookup

➡️ Download your free printable measuring tape

🧭 Explore the Tellar Fashion Hub – Always Free

Tellar also houses thousands of expert-written, stylist-led posts focused on style advice, sustainable brands, wardrobe curation, and body-flattering fits.

📚 Must-read resources:

🌍 Why It Matters

The fashion industry is responsible for approximately 10% of global carbon emissions. Sustainable fashion—paired with responsible consumer habits—has the power to:

  • Reduce pollution

  • Support ethical labour

  • Conserve water and natural resources

  • Extend the lifecycle of garments

Platforms like Tellar.co.uk ensure we can buy more thoughtfully, choose better fits, and reduce waste from poor sizing and returns.

📣 Follow Tellar for Real-Time Fashion Guidance

Stay up to date on the latest sustainable fashion trends, size science, and wardrobe advice from expert stylists.

“Find your size in 1,500+ brands in real-time. It’s free & easy.”

Tellar.co.uk – Honest. Unbiased. Independent. Always Free.

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