Flannel shirts are a timeless wardrobe staple, offering comfort, versatility, and a touch of rugged charm. But as we become more conscious of our environmental impact, it’s important to choose pieces that align with our values. Thankfully, sustainable fashion has come a long way, and there are now plenty of brands offering eco-friendly flannel shirts that don’t compromise on style or quality. Whether you’re looking for a classic plaid or a modern twist on this beloved fabric, I’ve rounded up the 7 best flannel shirts from sustainable brands in 2025. These brands prioritize ethical practices, eco-friendly materials, and timeless designs, making it easy to stay cozy while caring for the planet. Let’s dive in!

1. Patagonia

Patagonia is a leader in sustainable outdoor apparel, and their flannel shirts are no exception. Made from organic cotton and recycled materials, these shirts are durable, comfortable, and perfect for layering. Patagonia’s commitment to environmental activism and fair labor practices makes them a top choice for conscious consumers. Their “Men’s Fjord Flannel Shirt” and “Women’s Los Gatos Flannel Shirt” are customer favorites.

2. tentree

tentree is a Canadian brand that plants ten trees for every item sold, making it a great choice for eco-conscious shoppers. Their flannel shirts are made from organic cotton and feature classic plaid designs. The brand’s “Men’s Haven Flannel Shirt” and “Women’s Haven Flannel Shirt” are soft, stylish, and perfect for everyday wear.

3. Pact

Pact is known for its affordable, sustainable basics, and their flannel shirts are a standout. Made from organic cotton, these shirts are soft, breathable, and free from harmful chemicals. Pact’s “Men’s Organic Flannel Shirt” and “Women’s Organic Flannel Shirt” come in a variety of colors and patterns, making it easy to find your perfect match.

4. Outerknown

Founded by surfer Kelly Slater, Outerknown is committed to sustainability and ethical production. Their flannel shirts are made from organic cotton and recycled materials, with a focus on timeless designs and durability. The “Men’s Blanket Shirt” and “Women’s Blanket Shirt” are perfect for adding a touch of coastal cool to your wardrobe.

5. Kotn

Kotn is a Canadian brand that sources its cotton directly from Egyptian farmers, ensuring fair wages and sustainable practices. Their flannel shirts are made from 100% Egyptian cotton, offering exceptional softness and quality. Kotn’s “Men’s Flannel Shirt” and “Women’s Flannel Shirt” are available in classic plaids and neutral tones.

6. Thought Clothing

Thought Clothing is a UK-based brand that focuses on sustainable, natural materials and timeless designs. Their flannel shirts are made from organic cotton and feature relaxed fits and classic patterns. The “Men’s Flannel Shirt” and “Women’s Flannel Shirt” are perfect for layering and adding a touch of rustic charm to your look.

7. Fair Indigo

Fair Indigo is committed to fair trade and sustainable practices, offering high-quality flannel shirts made from organic cotton. Their “Men’s Fair Trade Flannel Shirt” and “Women’s Fair Trade Flannel Shirt” are soft, durable, and available in a range of classic plaid designs. The brand’s commitment to fair wages and ethical production makes it a standout choice.

Why Choose Sustainable Flannel Shirts?

Sustainable flannel shirts are more than just a fashion statement—they’re a way to support ethical practices and reduce your environmental impact. By choosing brands that prioritize organic materials, fair labor, and eco-friendly production, you’re investing in pieces that are better for the planet and the people who make them. Plus, sustainable flannel shirts are often made with higher-quality materials, ensuring they’ll last for years to come.

Tips for Styling Flannel Shirts

  • Layer It Up: Pair your flannel shirt with a cozy sweater or jacket for added warmth and style.
  • Dress It Down: Wear your flannel shirt with jeans and sneakers for a casual, laid-back look.
  • Tie It Around Your Waist: Use your flannel shirt as an accessory by tying it around your waist for a cool, effortless vibe.
  • Mix and Match: Experiment with different patterns and colors to create unique, personalized outfits.

Final Thoughts

Flannel shirts are a timeless addition to any wardrobe, and with these sustainable options, you can feel good about your purchase. Whether you’re drawn to classic plaids, modern designs, or bold colors, these 7 brands offer something for everyone. So, embrace the cozy charm of flannel and make a stylish, planet-friendly choice in 2025.

Which of these brands resonates with you the most? I’d love to hear about your favorite flannel shirts or any other sustainable brands you’d recommend!