A military uniform is a material based on textile, which translates to cellulose. The basic properties that each uniform possesses are achieved through combinations of differing base materials. It is also possible to achieve additional advanced properties through the utilisation of different coatings which are applied to the basic uniform. Those properties can be hardly achieved through the processing of the basic fabrics. Keeping the mentioned properties is demanding due to harsh conditions military uniforms go through during exploitation and maintenance. Special hygienic maintenance can have an adverse effect on preserving the functional coatings and crucial properties. This master's thesis revolves around testing the functional properties of the camouflage uniform currently utilised by the Croatian Armed Forces. Advanced thermal, spectroscopic and optic methods are used to analyse the material from which the uniform is comprised. A comparison was made between a completely new sample and one which has been aged through the simulation of wet and hot environments. The two samples show how the uniform keeps its functional properties. The uniform shows substantial degradation of properties through the aging process. The active coating is heavily compromised by sustained exploitation and maintenance, mainly due to physical strain the uniform goes through daily. This testing shows how important proper and responsible usage of the uniform actually is, and why it is crucial to properly maintain it in order to preserve those coatings and properties.