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Black long-sleeve shirt on a transparent background
thermal long sleeve top
organic cotton base layer
long sleeve thermal top
cotton thermal top
slim fit thermal top
Woman wearing a purple long-sleeve top and leggings against a white background
Purple long-sleeve shirt on a transparent background
White long-sleeve shirt on a transparent background
Blue long-sleeve shirt on a white background

Organic Cotton Thermal Long Sleeve T-shirt: Womens

£20.00
Tax included.

When the temperature drops, this is the layer you'll reach for first. The Earth Wardrobe Organic Cotton Thermal Long Sleeve Top is a long sleeve thermal top for women designed to sit close to the body, trap warmth naturally, and move seamlessly between base layer and standalone piece. Made from 100% organic cotton and manufactured responsibly in Bosnia (Comako, Kladanj), it offers the kind of quiet, considered warmth that synthetic thermals simply can't replicate.

The slim, close-to-body silhouette is cut with layering in mind — fine enough to sit smoothly under a blazer, knit, or winter coat, yet polished enough to wear on its own with jeans or wide-leg trousers. The deep round neck is trimmed in fine rib for a neat, clean finish, and the long sleeves feature double-stitched hems for durability that holds wash after wash. Because the fit is slim, if you prefer a little more ease when layering over thicker pieces, sizing up is recommended.

Organic cotton is naturally insulating without being heavy — it breathes as your body temperature changes, keeping you comfortable whether you're commuting, working from home, or heading out on a cold day. It's also free from synthetic pesticides and harsh processing, making it a better choice for sensitive skin and for the planet.

Choose Your Colour

Black — A wardrobe essential. Clean, versatile, and endlessly wearable — pairs with everything from smart trousers to weekend denim.

Dark Rose — A muted, dusty rose with warmth and depth. Softer than blush, richer than pink — a grown-up colour that works across seasons.

Natural — An off-white, undyed tone that feels clean and calm. Pairs beautifully with neutrals, earthy tones, and layered linen or wool pieces.

Velvet Morning — A soft, dusky mauve with a gentle blue-grey undertone. Understated and elegant — a subtle colour that feels effortlessly considered.

Key Details

  • 100% organic cotton — breathable, insulating, and naturally soft
  • Slim, close-to-body fit — ideal for layering
  • Deep round neck with fine rib trim
  • Long sleeves with double-stitched hems
  • Available in sizes S–XL and 4 colours
  • Manufactured in Bosnia by Earth Wardrobe
  • Machine washable

We plant one tree for every item purchased, in partnership with Ecologi. 🌳

Frequently Asked Questions

Why should I buy from you?

We source products based on ethics.

We plant a tree for every product you purchase.

All shipping is carbon neutral.

When you buy from a small business, like ours, an actual person does a little happy dance.

Where are you based?

We are based in Newcastle upon Tyne in the North of England UK.

Do you charge for postage?

For UK orders over £20 postage is free.

For smaller orders we regret we have to charge a postage fee.

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Shipping Policy

What is your refund policy?

You have 60 days to return your purchase for a full refund.

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