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Men's Long-sleeve T-shirt Merino Wool MT500

Sale price: $69.99 Regular price:

Looking for a comfortable, long-sleeved t-shirt? Here's the solution with this warm and breathable base layer that contains reinforced merino wool for superior durability!

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Sale price: $69.99 Regular price:

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About this item:

  • Warmth: Merino wool T-shirt for extra warmth on your base layer
  • Odor control: The Merino Wool (86%) naturally helps prevent unpleasant odors.
  • Softness: Ultra-fine (18.5 microns) Merino Wool. It is very soft and non-itch
  • Weight: 7.8 oz in size M. Fabric 6.7 oz/m2
Model: 8501955

Product Features

Men's Long-sleeve T-shirt Merino Wool MT500 | This T-shirt containing 86% merino wool lets you trek without worrying about perspiration odours. As a result, you can leave with a lighter backpack.

Looking for a comfortable, long-sleeved t-shirt? Here's the solution with this warm and breathable base layer that contains reinforced merino wool for superior durability!

A photo of the Men's Long-sleeve T-shirt Merino Wool MT500 in use
A photo of the Men's Long-sleeve T-shirt Merino Wool MT500 in use

Odor control

The component limits perspiration odours. Laboratory test ISO 17299-3


Merino wool T-shirt (190 g/sqm) to provide additional warmth

Abrasion resistant

Wool fibre surrounded by polyamide yarn for protection

Moisture wicking

The high absorption capacity of the wool removes the feeling of dampness


Merino wool is breathable, stays warm in winter, wicks away moisture in summer

Freedom of movement

The natural stretch of wool offers unrestricted movement


Ultra-fine (18.5 microns) Merino wool. It is soft and pleasant to wear


The T-shirt weighs just 222 g in size L. Fabric 190 g/sqm

Questions & Answers

Product Customer Reviews

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Very warm

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Same quality as always

The perfect blouse for sports activities in the mountains and beyond. Evacuates sweat and does not retain odors. Combined with another sweat-wicking blouse and a "smart" jacket with zippers that allow the opening and ventilation of the armpits, the IDEAL EWTE. Left to air out overnight, the next day it's as good as new! RECOMMEND!!!

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The product is as we expected

Convenient small packaging

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Worse than synthetic.

Worse than a synthetic bottom layer. Worse, because wool can absorb even more moisture than cotton. It's one thing that (supposedly) wool is pleasant to wear even when wet... but the task of the bottom layer would be to drain away sweat, and wool fabric is not suitable for this. It didn't work for me, I took it back. In addition, wool, even mixed fiber, cannot be as close-fitting as 100% man-made, synthetic. That is, it stops - so it is even more unsuitable for draining sweat. I tried 5 wool (mixed wool fiber) underwear and "long-sleeved hiking shirts" from the Decathlon range, and none of them were close-fitting. However, among the ones I've tried, this one still fits the body the best. It might be good for you to stay in this hotel or to sleep in this sleeping bag. I definitely do not recommend wearing it during a tour.

Comfortable to wear ;-)

Comfortable to wear ;-)

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Everything OK

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Favorite shirt factor

My size (XL) Made in Portugal - other sizes Made in China. This Meriino shirt is great - whether worn alone or underneath. The color is great. Keeps you warm, wicks away sweat well, can handle anything. I'm very satisfied - so far everything is great, even after several washes (merino wool!).

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Warm and not ugly

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Merino is not warm!

Merino is not warm, it's stupid. In order for something to be warm, it must radiate heat energy. When I sweat in a t-shirt, it cools me down! It might be nice in the summer, but it bothers me in the winter. And very!

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Product that allows…

Product that helps you stay warm

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Good offer

Price - performance = very good

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not scratchy and warm

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After actually taking it to skiing, I didn’t feel any discomfort. It’s a great product.

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Additional Product Information


Main fabric: 86.0% Wool, 14.0% Polyamide ; Yoke: 98.0% Wool, 2.0% Polyamide

Odour control

The component limits perspiration odours. This Merino wool t-shirt can therefore be worn several days in a row and means you can take less clothes when trekking making for a lighter backpack!

Reduction of the freezing effect

When you make a physical effort and sweat heavily, the merino wool easily traps the insulating warm air and can absorb up to 35% of its weight in moisture without making you feel damp, which is appreciable in cool weather. In hot, dry weather, the evaporation of the water in the wool absorbs energy, which cools the body slightly at the same time.

Tip before use

For a softer feel, wash your t-shirt before first use.

How to wash your t-shirt made with merino wool?

We recommend that you machine wash your MT500 MERINO wool T-shirt at 30°C on a normal cycle, preferably with liquid detergent. Dry flat and NEVER tumble dry unless you want it to shrink by one or two sizes!For more information:

Product testing

In November 2018, 8 trekkers (4 men and 4 women) and part of the Forclaz design team tested this T-shirt for four days in the Southern French Alps (Lus La Croix Haute). You can expect wind, rain, a bit of snow, a bivouac... and a lot of fun! We were then able to make the final modifications and validate it for mountain trekking use.



Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


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