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Forclaz Trek 500 Long Sleeved Merino Wool Hiking T-Shirt

Sale price: $69.99 Regular price:

Looking for a comfortable, odor-free long-sleeved T-shirt? This long-lasting reinforced and breathable Merino wool undergarment is ideal!

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Sale price: $69.99 Regular price:

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San Francisco, 735 Market St. Options

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Model: 8501956

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Product Features

Forclaz Trek 500 Long Sleeved Merino Wool Hiking T-Shirt | This Merino wool T-shirt means you can trek for longer without worrying about bad odors. You can travel with a lighter backpack.

Looking for a comfortable, odor-free long-sleeved T-shirt? This long-lasting reinforced and breathable Merino wool undergarment is ideal!

A photo of the Forclaz Trek 500 Long Sleeved Merino Wool Hiking T-Shirt in use

Odor control

The Merino wool (86%) naturally helps prevent unpleasant odors


Merino wool T-shirt for extra warmth on your base layer

Abrasion resistant

Use of wool fiber surrounded by polyamide yarn for protection

Moisture wicking

The high absorbency of wool helps keep the body dry


Merino wool is breathable and helps maintain the right body temperature

Freedom of movement

The natural stretch of wool offers unrestricted movement


The T-shirt weighs just 7.8 oz in size M. Fabric 6.7 oz/m2


Ultra-fine (18.5 microns) Merino wool. It is very soft and non-itch

Product Customer Reviews

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Forclaz  Trek 500 Long Sleeved Merino Wool Hiking T-Shirt,asphalt blue
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Great shirt, incredible value

I bought this in orange. Very slight quality control issues on an inner seam but nothing functional nor a deterrent to this exceptional value. 86% merino long sleeve for $45. I would love to try the short sleeve merino shirts but I really dislike the two-tone color theme Decathlon does with some garments. As we say here in the US, it looks really cheesy.

Great layer for various activities

Bought this for backpacking and quickly found it works well as a layer for cool/cold weather golf as well. Comfortable, great fit and plan on ordering a few more.

Love the colour!

Dries super fast too. I washed it in my washing machine on delicate and then hung to dry. It was dry in about an hour I was so surprised!

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Hello Stephan! 


Thank you for taking the time to write to us about your product experience.


Wishing you a fantastic day :)


Thanks & Regards,

Decathlon Brampton Team

Cosy top

Very cosy comfortable top.

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Super, warm, light and cool feeling all in one. Great product, would have liked less branding but this is a small issue for a pair of scissors.

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Quality Piece of Kit

I've used these baselayers when mountain biking. They are easily as good as other makes that cost twice as much. I can't fault them and the fit is as described.

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bloody ace and really warm

brilliant base layer for the money, I have two now and more to get, the older one has had loads of washes and still in good shape no sign of shrinking. the wool makes it warm and not a sign of BO, so can wear for days when out on adventures,

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Poor at best

After one wash the product in question developed a hole in the right shoulder. A poor quality product in my eyes, stay well clear. When I approached decathlon I was told I could get a refund or exchange, only if I come to a store or fill out all paperwork and send back for a refund. Very inconvenient and this has tainted my opinion of Decathlon.

Great quality

Really good quality top, very warm, fits slightly smaller, washes great.

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Good quality and value, soft, warm and comfortable

After using Icebreaker tops and leggings for a few years I was surprised these tops are so well made. I prefer them over my other brands now as they are softer and a better fit and a bargain at around half the price. I'm really impressed with these tops. The two I have are now nearly a year old and have been worn and washed a lot and are looking fine with no signs of wear.



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Menb's Molun tain Trekking Merino T shirt

Good quality and price.

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Hi Chi Cheong,

Thank you for supporting Decathlon Hong Kong and your feedback on your experience with our product!

We sincerely appreciate your insight! We can't wait to offer you more and better products in order to delight your sport experiences! Hope to see you around soon!

Stay healthy!


Carmen Kwong

Decathlon Hong Kong Hiking & Trekking Team

Ka man


OK, Not as expected

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Used at the temperature -6 degrees and worked like a charm

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I got this as a base layer for use in the cold Pittsburgh winter, and it's worked quite well. The fabric is soft, fit is good, and keeps me warm.

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Additional Product Information


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

How have we reinforced the durability of our merino wool t-shirt?

We use a BETA-SPUN yarn structure in which the polyamide threads coat the Merino wool fibers and protect them from rubbing and cuts without affecting their properties.

Odor control

Wool from Merino sheep naturally controls the spread of bacteria that cause bad odors. This Merino wool T-shirt can therefore be wornseveral days in a row and means you can take less clothes when backpacking making for a lighter backpack!

Reduction of the freezing effect

After exercise and sweating heavily, Merino wool prevents evaporation helping to maintain body temperature by absorbing the majority of the body's moisture. This therefore reduces any unpleasant chilling effect.Conversely, a synthetic material lets the body temperature go back down again quicker.

Tip before use

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

How do i wash my merino wool t-shirt?

We recommend that you machine wash your Merino wool T-shirt at 86°F on a normal cycle, preferably with liquid detergent. Dry flat and NEVER tumble dry unless you want it to shrink by 1 or 2 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 4 days in the southern French Alps (Lus La Croix Haute). On the agenda, 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 use for mountain backpacking.



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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