LOOW Lightweight Merino Long Sleeve

Last updated: 22 October 2026

What the LOOW merino long sleeve is

LOOW is a Danish clothing brand founded in 2015 by Anders Lorentzen. It makes clothing mainly from merino wool, and its designs borrow ideas from Danish army kit, according to its profile on The Hub.

Of its long sleeves, this is the lightest in the range. For example, it works as a base layer under a shirt, a jumper or a rain jacket, or on its own on a mild day.

Why merino in a T-shirt

LOOW chose pure merino for this model because of its softness and the way it regulates temperature. In addition, the 135 fabric is deliberately thin, so it feels airy and lets excess heat escape, even when your activity level changes.

Also, the wool stretches, so the top moves with you. As a result, LOOW pitches it for everyday wear, travel and yoga.

Key facts

• Price: £80 for the women's W-135 Longsleeve; £56 for the men's T-OLS 135 in the outlet
• Fabric: 100% merino wool, LOOW's 135 weight
• Made in: Denmark, where the fabric is knitted
• Heavier option: the 220 fabric, sold as the W-220 Longsleeve at £86

Who the LOOW merino long sleeve suits

• Travellers who pack light: one thin layer that goes under a shirt or a jumper.
• Walkers in cold weather: a base layer under a shell jacket.
• People who run hot indoors: the thin fabric lets heat out.

For more ideas for the suitcase, see our guide to travel accessories in the UK.

The limits

However, the thin fabric wears out faster. LOOW says the 135 material can develop holes more easily than its thicker fabrics, and it suggests the 220 weight if you want something more durable and warmer.

Meanwhile, the men's version is hard to get. The full-price T-OLS 135 Longsleeve was sold out on 22 October 2026, and the outlet only had extra small and two of the largest sizes.

Finally, £80 is a lot for a T-shirt. You are paying for pure merino knitted in Denmark.

Where to buy the LOOW merino long sleeve in the UK

LOOW sells direct from its own shop, and it shows prices in pounds for UK buyers. Right now, the women's W-135 Longsleeve is in stock in most sizes, and the men's T-OLS 135 is in the outlet while sizes last. However, I struggled to find LOOW on Amazon UK.

LOOW W-135 Longsleeve

FAQs

How much is the LOOW merino long sleeve?

£80 for the women's W-135 Longsleeve. By contrast, the men's T-OLS 135 is £56 in the outlet, in limited sizes.

Where is LOOW clothing made?

In Denmark. LOOW knits its 135 merino fabric there, and the brand is also based there.

Is the LOOW 135 long sleeve durable?

It is less durable than LOOW's heavier tops. Because 135 is the brand's thinnest fabric, LOOW says it can get holes more easily, so choose the 220 weight if durability matters more.

Is it 100% merino?

Yes. Both 135 long sleeves are pure merino wool, with no synthetic fibres listed.

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I checked the prices and stock at LOOW on 22 October 2026.

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