The Nordic Combat Uniform system (NCU) is a cooperation among Denmark, Finland, Norway and Sweden with the goal of procuring a combat uniform system with accessories.

It is a project under the auspices of NORDEFCO, and a Technical Arrangement (TA) among the nations is developed in the Cooperation Armaments Working Group Nordic Combat Uniform (COPA ARMA WG NCU). The TA establishes the framework for cooperation with the goal of a concept of a multi-layering combat uniform system functional in varying conditions.
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From the for Nordic countries around 420 soldiers from the different arms and services covering different types of units, area of operations, professional soldiers, conscripts, and genders took part in testing.

The NCU-system consists of several layers that can be combined into different configurations. This gives the user a big flexibility and the ability to adapt to a variety of work and climate challenges. All layers have full interoperability and are designed to work together from the ground-up.

Extensive resources have been put into the development of the project.Ranging from state-of-the-art computer simulations, thorough laboratory experiments to large-scale field testing. Only the highest quality materials are chosen, this gives unprecedented performance in areas such as flame resistance, water repellent, breath ability, weight, and abrasion resistance.

Aclima and Woolpower, both having their own specialized wool technology, will be used close to the body and as heat insulation layers.
Siamidis will supply the rest of the combat uniform (jacket and trousers), as well as cold weather add-on, all made with the latest GORE-TEX Professional technology.

The Nordic Combat Uniform System consists of three configurations:
- The European which is divided in an intermediate part covering down to minus 19 Celsius and a cold ad-on covering temperature down to -45 Celsius.
- The desert configuration covering hot/dry.
- The jungle configuration covering hot/wet.

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