This paperwork analyses the synthesis of literature regarding functional textiles. The actuality of the theme is determined by the overwhelming specialists' interest upon the solution to the problem of elaboration of new generation textiles, and the possibility of these to be worn by the special-needs persons, their number being constantly increasing. This paperwork aims to fundament the theoretical knowledge regarding the classification of the functional materials and establishing their area of use. The main target of this paperwork is also to recommend certain constructive and technical solutions, which shall be taken in consideration while designing clothing products and using innovative textiles. As well we aim to define the field of functional textiles and the field of medical, smart and bioactive textiles. The results of the study will be proven by the chart of classification of functional textiles, and by the solutions given in order to it. The paperwork will present the classification of textiles based on functions, characteristics, areas of use, development stage, types and activity field and the origin of bioactive substance. The medical field of functional textiles is the most important because 2 major directions are presented and both include bioactive materials and smart medical ones. The chart is completed with certain constructive and technical solutions which form their own concepts. The classification chart and the one that determines the area of use are recommended to be taken into consideration in order to facilitate the proccess of textile selection, that are neccessary for functional medical clothing manufacture.