Men's Merino Liner Jacket - Blue


The use of Merino wool in the design of this liner jacket guarantees natural thermal comfort down to 10°C when worn as a 2nd layer.

It also provides breathability and odour control. Finally, it is very practical with 2 hand pockets and one zipped chest pocket.

Color: Asphalt blue / BLACK
Size: size guide


Product benefits


Use of a fabric made from merino wool (63%). Comfortable down to 10°C.


The main fabric uses polyamide-sheathed yarns for added strength


The inner structure, knitted in channels, helps maintain an ideal body climate

Freedom of movement

Very good stretch thanks to the addition of 4% elastane make it more comfortable


3 pockets with a zip for safety. Never lose anything in the mountains again!


This liner jacket weighs approx.365g in size LPerfect to take on a trek with you

Technical information


We took care to create a high collar that completely protects you from the cold.
And we've added thumb loops to keep your hands nice and warm.

Hybrid construction for increased versatility

The front panel is lined with very light insulation made up of fibres joined together by a mesh structure. The whole thing, made of 100% recycled polyester, provides thermal regulation, breathability and protection from the wind.
The main fabric made from thick (260g/m2) merino wool (63%) provides the right level of warmth.
A lightweight component (190 g/sqm) under the arms encourages breathability.

How to wash your MT900 jacket in merino wool

We recommend you machine-wash your liner jacket 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!

What is our commitment to animal welfare?

For this product, we only use wool from Merino sheep raised 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. This means we have full traceability, which allows us to guarantee the origin of the wool.
More information: visit our website


2 years


S : 0.34 kg
M : 0.355 kg
L : 0.365 kg
XL : 0.38 kg
2XL : 0.4 kg

Product concept & technology

Product Composition

Main fabric 63% Wool, 24% Acrylic, 9% Polyamide, 4% Elasthane Main lining 90% Polyester, 10% Elasthane Front side fabric 100% Polyamide Cuff 86% Wool, 14% Polyamide Padding 100% Polyester


During the summer of 2020, several people independent of Decathlon tested this product. Rémi, for example, used the MT900 Merino liner jacket as his only protection against the cold during his Grande Traversée des Alpes along the GR5 trail. He was completely satisfied with it!

Maintenance advice

Machine wash - 30° max - normal

Do not bleach

Do not tumble dry

Do not iron

Do not dry-clean


Men's Merino Liner Jacket - Blue
Men's Merino Liner Jacket - Blue
Men's Merino Liner Jacket - Blue
Men's Merino Liner Jacket - Blue


Customer reviews


Environmental Impact

The carbon footprint of this product is:
28.43 kg CO2e
1 kg of CO2e represents 5km in a petrol car (according to the Base Carbone© of ADEME)
What's the carbon footprint ? We evaluate the environmental impact of all our products. At all stages of their life cycle: from the extraction of the raw material, passing through transport to the plant which transforms them, the transformation, the manufacture, the transport of the finished product, until its use and end of life. Find out more
The environmental note of this product is: D
What is the environmental note? Overall environmental score for this product in comparison to others in the same category. It is calculated based on its impact on the environment (air and water emissions, greenhouse gas emissions, depletion of natural resources) at each stage of its life cycle, according to a system managed by ADEME. Find out more