Composite materials reinforced with a polymer matrix are a new type of material for reinforcing and reconstructing construction objects. The use of composite material in construction began as a replacement for standard steel reinforcement, with the advantages of lighter weight and greater chemical and corrosion stability. As a result, a broad range of applications for fibrous materials reinforced with polymers in other industries has been realized. Today, there is a large selection of various reinforcements in different forms on the market, and their development is still ubiquitous and relevant today. The purpose of this thesis is to explain and provide a description of composite materials. In the first section, the word composite materials as well as its definition and characteristics are provided. The explanation of various composite reinforcements, their benefits and drawbacks, and the kinds of fillers that guarantee the accomplishment of higher composite qualities came next. Following that, the many forms of polymer materials are explained along with their properties and structure. The steps and methods used to produce composite materials are described towards the conclusion of the theoretical section. In the experimental part of the paper, the test procedures are explained, i.e. the procedure for measuring the composite cross-section and testing the tensile strength of composite meshes according to the ISO standard 10406-1:2015. Four types of composite reinforcements made of AR glass and carbon fibres, impregnated with epoxy resin were used for the tests. In conclusion, a statistical analysis was performed and a conclusion was presented based on the conducted examination.