In this study, the thermal comfort of clothing was subjectively evaluated in cold environmental conditions. Different
male business clothing systems, made of standard textiles (wool and wool-mixture), and materials that contain phasechange materials (PCMs), were developed. The research was performed with the help of test subjects in a computer
controlled climatic chamber, in artificially created cold environmental conditions, at ambient temperatures of 10 °C,
5 °C and 0 °C, and with physical activity that is as reminiscent as possible of the real life situation of wearing clothes,
such as sitting and walking on a treadmill. The impact of particular business clothing systems and varied cold
environmental conditions on the wearer’s subjective feeling of thermal comfort was determined with a questionnaire
and an assessment scale of thermal comfort defined by standard ISO 10551:2004. For this purpose, an analysis of the
subjective evaluation of thermal comfort, the desired thermal state, the acceptability of the current situation and their
personal tolerance of the environment, was made before, during and after each experiment. The results of the
research show that subjective evaluations of thermal comfort directly depend on environmental conditions, as well as
clothing systems. From this subjective evaluation it can be seen that in spite of lower mean skin temperatures the test
subjects felt comfortable at an ambient temperature of 10 °C. It is also evident that the analysed clothing systems are
not suitable for wearing below an ambient temperature of 0 °C, because the test subjects felt uncomfortable.