Underwear with the same design was made out of four kinds of fabrics ; cotton, wool, camel, or cotton / polyester mixture, Four young females volunteered as subjects in this experiment. They spent 90 min in a climate chamber, in which the air temperature was kept at 20°C or 10°C, and performed an exercise of 2 met for 20 min on a bicycle ergometer. Through the experiment, the subjects wore 0.5 clo at 20°C or 1.5 clo at 10°C, including one of the underwear mentioned above.
　Temperature and humidity between the skin and underwear increased by the sweating during the exercise and then recovered. The amount of the increment was smallest with the camel underwear and smaller with wool and cotton underwear than cotton / polyester mixture one. Subjective evaluation of the thermal, soaking, and com-fort sensations confirmed above physical findings. Then it was concluded that, as the material of the underwear used for the exercise or labour accompanied with sweating in a cold weather, camel was the most suitable and cotton and cotton / polyster mixture were the least suitable.

DESCENTE SPORTS SCIENCE Vol.12/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE