14 Best Organic Cotton Long Sleeve T Shirts Perfect For Layering

Are you looking for an organic cotton long sleeve t-shirt? We’ve got you covered with a round-up of the best brands creating relaxed styles for men and women.

Long-sleeved t-shirts are a versatile piece every wardrobe needs. They’re great at keeping you warm while looking stylish. They can be effortlessly paired with jeans for a casual and relaxed look or dressed up under a blazer.

By choosing an organic cotton long sleeve t-shirt, you can help save over 80% of the water required to produce a conventional cotton t-shirt. Plus, Organic cotton is grown without harmful chemicals or pesticides, so it’s kinder to your skin and the planet.

Featured long sleeve t-shirts: Colorful Standard

So, let’s jump in and discover our favorite brands.

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1. Pact

Pact organic cotton long sleeve t shirt

Key Features: Fair Trade Certified organic cotton long sleeve t-shirts available in different colors.

Styles: Stretch organic cotton t-shirt, v-neck long sleeve t-shirt

Sizes: XS-2X

Ships to: Worldwide

Pact is a sustainable clothing brand partnering with Fair Trade suppliers worldwide. The brand uses (GOTS) Global Organic Textile Standard organic cotton to create its clothing, including its long-sleeved t-shirts.

Using organic cotton, Pact uses less than 81% of the water required to create a conventional cotton t-shirt.

Pact’s long sleeve cotton t-shirts are available in V neck, stretch styles, turtlenecks, and in a range of versatile colors, which can pair effortlessly with your closet.

Pact mens organic cotton long sleeve t shirt

2. Colorful Standard

Colorful Standard Unisex organic cotton long sleeve t shirt

Key Features: GOTS certified organic cotton long sleeve t-shirts, ethically made in Portugal and available in over twenty colors

Styles: Organic rib long sleeve t-shirt, Oversized organic cotton long sleeve shirt

Sizes: XS-XL

Ships to: Worldwide

Colorful Standard is here to add a splash of color to your wardrobe. The brand focuses on creating ethical and sustainable styles in various must-have colors.

C.S’s unisex GOTS organic cotton long-sleeved t-shirts are vegan PETA-Approved and use environmentally Friendly Oeko-Tex®certified dyes to create a versatile, soft, and clean-cut shirt.

With over twenty colors available, choosing which colors to wear will be the most challenging part!

Colorful Standard mens organic cotton t shirt


Key Features: Certified B Corp, creating cotton basics from BCI cotton

Styles: Ribbed long sleeve t-shirt, crewneck long sleeve t-shirt

Sizes: XS-XXL

Ships to: the US & International

is a certified B corporation, creating premium clothing essentials from luxurious Egyptian cotton sourced from Better Cotton Initiative farms.

The brand uses OEKO-TEX® non-toxic certified dyes to craft its chic minimalist styles and ships them in plastic-free packaging.

KOTN yellow organic cotton long sleeve

4. Girlfriend Collective

Key Features: Sustainable long sleeve t-shirts made ethically from sustainable materials, including recycled materials, organic cotton, and Cupro.

Styles: Heavyweight long-sleeve T-shirt, and drapey t-shirts in dreamy colors

Sizes: XS-6XL

Ships to: Worldwide

Girlfriend Collective is a sustainable brand gaining popularity for creating chic recycled activewear, but did you know the brand also makes a range of long sleeve tops in dreamy colors?

Using a combination of organic cotton, cupro, and recycled materials, Girlfriend Collectives t-shirts help reduce plastic waste by using recycled plastic bottles.

Plus, we love that Girlfriend is a size-inclusive brand, designing clothing to fit every body shape and size.

5. Tentree

Tentree long sleeve tshirt

Key Features: Climate-neutral brand creating men’s and women’s clothing from sustainable and organic materials, including organic cotton, Tencel, and more.

Sizes: XS-XL

Ships to: the US & International

Want to look good and help the environment at the same time? Now you can help with , a Canadian clothing brand that plants ten trees for every item purchased.

The sustainable brand is on a mission to plant one billion trees by 2030, and so far, have planted over seventy million trees.

Tentree designs practical and stylish long sleeve t-shirts from eco-friendly materials, including Tencel, made from wood pulp and organic cotton. This allows Tentree to save water and energy in the production process.

Tentree partners with audited factories to ensure ethical production in its supply chain.

Tentree Organic cotton mens long sleeve

6. Mate

Mate organic cotton long sleeved tshirt

Key Features: Climate-neutral certified brand, creating Made in the USA clothing from 100% organic cotton.

Styles: Cropped long sleeve t-shirts

Sizes: XS-XL

Ships to: the US & International

Los Angeles-based sustainable fashion brand Mate designs and crafts organic clothing ethically in its LA factory.

By having its factory a short drive from its headquarters, Mate can lower its carbon footprint and ensure the highest ethical production standards.

Mate’s clothing is super soft and chic and made from organic cotton, allowing the brand to save almost 84% of the water required for a standard cotton tee.

Mate t shirt

7. For Days

For Days striped organic cotton long sleeve tshirt

Key Features: Fully recyclable, 100% organic cotton long sleeve t-shirt

Styles: Boxy long sleeve t-shirts, cropped LS t-shirts, striped styles

Sizes: XS-XXL

Ships to: the US

For zero-waste circular fashion, check out For Days. The brand creates fully recyclable clothing from sustainable materials, which you can send back for store credit towards new items.

For Days creates versatile and stylish clothing for men and women, including a range of long sleeve organic cotton t-shirts, many of which are a playful take on the classic long sleeve t-shirt.

For days mens organic cotton long sleeve t shirt

8. Patagonia

Patagonia sustainable long sleeve tshirt

Key Features: Certified B Corp and 1% for the planet members using recycled materials, including recycled cotton and polyester.

Styles: Technical long sleeve t-shirts, cotton long sleeve t-shirts

Sizes: XS-XL

Ecothes Rating: 5/5

Ships to: Worldwide

Patagonia creates high-performance, sustainable clothing ethically from sustainable materials.

We love Patagonia’s classic cotton long sleeve t-shirt, which features the iconic Patagonia logo on the back. The classic tee is made with recycled polyester and cotton and sewn in Fair Trade certified factories.

Patagonia also designs a range of practical outdoor active t-shirts, including long-sleeve hiking, biking, and walking t-shirts.

Also available at Surfdome.comCotswoldoutdoor.com, and alipinetrek.co.uk.

Patagonia mens long sleeve t shirt

9. Harvest and Mill

Key Features: Made in the USA clothing from organic cotton grown in the USA.

Styles: Raglan organic cotton long sleeve, unbleached and un-dyed organic cotton t-shirts

Sizes: XS-XL

Ships to: the USA & International

Look no further than Harvest and Mill for 100% Made in USA clothing. The organic clothing brand uses organic cotton grown in the USA and designs, sews, and ships all of its premium clothing from the US.

Harvest and Mill specialize in high-quality relaxed basics, including long-sleeve tops, joggers, and sweatpants.

The brand reduces its carbon footprint by creating nontoxic, carbon-neutral clothing and sustainable practices.

10. Boody

Boody bamboo long sleeve t shirt

Key Features: Ultra-soft, FSC-certified organic bamboo clothing, Standard 100 certified by OEKO-TEX®

Styles: Scoop neck bamboo long sleeve t-shirt

Sizes: XS-XL

Ships to: Worldwide

For an alternative to organic cotton, try organic bamboo clothing. Boody is the market leader in creating ultra-soft, comfortable bamboo clothing.

Boody’s soft bamboo long sleeve tops are breathable, antibacterial, and thermo-regulating, keeping you comfortable all day long.

Boody mens bamboo organic long sleeve t shirt

11. Graceful District

Key Features: Made in the USA from organic cotton and recycled fibers

Styles: Women’s scoop neck long sleeve tops

Sizes: XS-XXL

Ships to: the US

Made in the USA, clothing brand Graceful District carefully crafts its designs locally in Southern California.

The brand focuses on creating slow fashion using sustainable materials, including organic cotton. Graceful Districts long sleeve t-shirts are soft and hold their shape after washing.

The graceful district is part of the Kid First program, which means $1 of every Graceful District order goes directly toward children in need.

Graceful District organic cotton long sleeve t shirt


Key Features: B Corp, Fair Trade Certified t-shirts from GOTS organic cotton and eco-friendly dyes

Styles: Stretch organic cotton t-shirt, organic tunic

Sizes: XS-XL

Ships to: Canada, the US, & International

is an apparel brand creating soft, sustainable, and simple t-shirts from eco-friendly materials.

The Good Tee uses GOTS organic cotton and eco-friendly dyes to create a range of organic long sleeve and 3/4 sleeve t-shirts.

The brand creates classic and on-trend styles such as batwing t-shirts, ruched tees, and more.

The good tee organic cotton 3/4 sleeve t shirt


Thought clothing long sleeve organic cotton top

Key Features: Fair Trade and organic cotton tshirt styles

Styles: Scoop neck, high-neck, and v-neck tshirts

Sizes: XS-XXL

Ships to: Worldwide

I don’t know about you, but I seriously can’t live without a long sleeve tshirt. I have a couple of pieces from clothing, which I can count on season after season.

The UK-based brand is a family-owned brand aiming to spread the joy of dressing more responsibly. They use organic cotton and other sustainable materials like Tencel to create their pieces.

They have a seriously good selection of long sleeve t-shirts which you can dress up or down.

Thought long sleeve organic cotton top

14. Amour Vert

Amour Vert long sleeve organic cotton tshirt

Key Features: Organic cotton and modal fabric blend

Styles: Scoop neck and turtleneck styles

Sizes: XS-XXL

Ships to: Worldwide

Amour Vert (which means Love green) is a sustainable brand creating on-trend pieces from the latest innovative sustainable materials.

The brand has a range of organic cotton and modal blend long-sleeve t-shirts, which will look fabulous paired with a pair of jeans or dressed up under a blazer!

Amour vert long sleeve top
What is organic cotton?

Organic cotton differs from conventional cotton because it’s grown via more environmentally friendly processes. Organic cotton is produced by natural farming methods and doesn’t use harmful pesticides or fertilizers, unlike regular cotton. Instead, farmers use natural techniques like crop rotation to increase pest resistance and improve soil fertility.
In addition, organic cotton can help to save water, with some studies showing up to a 90% water saving compared to conventional cotton.

Where can I buy organic cotton long sleeve tshirts?

You can buy long sleeve t-shirts made from organic cotton online from any of the brands in this list. Some brands have a brick and Motor store, such as Amour Vert and Reformation, but most of the brands we’ve recommended ship worldwide!

We hope you’ve found the perfect long sleeve top which will fit seamlessly into your closet. For other organic t-shirt staples, check out our guides on tank tops, t-shirts, and turtlenecks.

All the brands here get great reviews on comfort, quality and fit. In addition, each brand is using sustainable practices, to create clothing which is better for people and the planet.

If you enjoyed this article, you might also enjoy reading sustainable sneakers, organic underwear, boxers, and pajamas.


Bethany Worthington BSc (Hons) (she/her) is the Sustainable Fashion Editor and Co-founder of Ecothes. She has a passion for the environment, and a long love of all things clothing, and combines those two interests with Ecothes. In her free time she loves dancing, hiking in the countryside, and laughing with friends.

Articles: 207

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