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Men's Mountain Trekking Merino Tights Undergarment - TREK 500 - Black

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Men's Mountain Trekking Merino Tights Undergarment - TREK 500 - Black
Our team of mountain trekking enthusiasts developed these Merino tights so you can trek for longer without worrying about bad odours

Looking for a comfortable, anti-odour base layer? These long-lasting reinforced Merino wool tights are ideal.

A photo of the Men's Mountain Trekking Merino Tights Undergarment - TREK 500 - Black in use

Odour control

The Merino wool (86%) naturally helps prevent unpleasant odours.


Tights made of Merino wool to provide an extra warm base layer

Abrasion resistance

Use of wool fibre surrounded by polyamide yarn for protection.

Moisture management

The high absorbency of wool helps keep the body dry


Merino wool is breathable and helps maintain the right body temperature.

Freedom of movement

We have added 4% elastane for superior elasticity and support.


Tights weigh just 191 g in size L. Fabric 190 g/m2.


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


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Product Reviews

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Write review Men's Mountain Trekking Merino Tights Undergarment - TREK 500 - Black
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Warm, comfortable, and being wool doesn’t hold oder.

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Quality and value

Much better quality than similar weight base layers from other brands and, these are at a great price

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Great purchase

These are excellent - better quality and warmer than some much more expensive ones that I've purchased elsewhere. I'm really pleased with them.

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Lower Base layer


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Will buy again

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Poor Quality Product

As price more product has low warm quality. In market, you can buy same quality product at Rs 500 to Rs 900.


Hello Sudhir

Thank you for taking out time to give your valuable review. We are sorry that you were not satisfied with the product. Trek 500 Merino base layer is a merino wool product which is known for its anti bacterial features. We use merino wool component in your T-shirts and base layers for trekking sport so that one garment is enough for several days and keeps you warm, It doesn't stink which is its natural benefit. However If you need is of a very warm inner layer I suggest you to go with



Product Trainer and Passionate Backpacker


Not very affective in winter

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A very good product

This product is as my requirement. I love it.

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Excellent inner wear

Excellent inner warm wear

Not very warm

I bought these for a 10 day trip to Ladakh in October. The decathlon sales person recommended these over the basic Wedge tights and said that these would be warmer as they are made of Merino. Honestly, I didn't feel much warmth with these under the Trek 900 pants. The Wedge base layer is much warmer in my opinion. Also, the elastic band around the waist is horrible with a size S running between 87-92 cms (about 34 to 36 inches). The tights keep running down if not worn with another layer on top to secure them. I don't what size slimmer guys like me are going to get.

Hello Mr. AR
Thank you for taking out time to give your valuable feedback . We are extremely sorry for the bad experience you had. 
We generally recommend Merino wool for long trips like yours because their major benefit is that they are anti bacterial because of the type of wool you can use them for multiple days ,even upto seven days while Backpacking  or Trekking and the product won't develop  any bad odour and also they are warm.
However we really appreciate you writing us about the elastic fault and expressing your dissatisfiction, Please reach out to your nearest Decathlon store and get your product exchanged or refunded.
I hope the information was helpful, kindly write back to me in case of any further queries.  

Product Trainer and Passionate Backpacker
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Product information


Main fabric

  • 4% Elasthane
  • 10% Polyamide
  • 86% Wool


  • 2% Polyamide
  • 98% Wool

Sizing and fit

These tights have a close fit to help the transfer of moisture to the outside of the fabric.4% elastane added for comfort and freedom of movement.

What is our commitment to animal welfare?

We only use wool from Merino sheep bred on farms in South Africa that do not practice mulesing.We decided to build a partnership with a group of breeders (Konsortium Merino) to guarantee respect for animal welfare and the environment.We have full traceability which allows us to guarantee the origin of the wool.More information:

How have we reinforced the durability of these merino wool tights?

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

Odour control

Wool from Merino sheep naturally controls the spread of bacteria that cause bad odours. These Merino wool tights can therefore be wornseveral days in a row and means you can take less clothes when trekking making for a lighter backpack!

Tip before use

For a softer feel, wash your tights before first use.

How do i wash my merino wool tights?

We recommend that you machine wash your Merino wool tights at 30° 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:

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