The aim of the study was to prepare and develop the essential elements for the implementation of virtual simulation of clothing protecting against heat in order to carry out the next steps of the clothing modeling in three-dimensional space. In this manner it’s possible to demonstrate the potential of computer system-aided design and a new approach to the design process on the example of the project of clothing protecting against the high temperature. The work has been done using the Lectra CAD system. The software of CAD system used in the project included modules enabling to generate and to model the forms of clothing, its visualization, as well as the virtual simulation of clothing taking into account the sewing process in MODARIS. Hardware device such as DIGITIZER was used to allow the digitization of data.