The current application of Phase Change Materials (PCMs) in protective clothing is mostly limited to providing comfort through temperature regulation in extremely hot or cold weather. In this research work, PCMs were incorporated into a firefighter's garment fabrics for the purpose of enhancing its thermal protective performance. Woven and knit Spentex® fabrics were permeated with selected hydrated salt PCMs. Thermal properties were measured in terms of conductivity, resistivity, and thermal protective performance (TPP). The rate of temperature rise on the wearer side was also traced. It was observed that the inclusion of PCMs increases the fabric thickness and its thermal conductivity which, in turn, results in a slight increase in the thermal resistance. Results of the TPP test show a significant increase in the protection time and performance with the use of PCMs. Such extension in the tolerable rescue time can be important in preventing burns.