Three common skiing clothing systems (in three layers of underwear, ski undershirt, and ski-wear) were studied using three kinds of underwear to make clear the effect of clothing systems on human body. In this study simulation tests using THERMO LABO II were conducted under conditions approximated to actual wearing. The measurements were carried out at alternate ambient temperatures of -6 and 25°C.
The test results are summarized below :
(1) No difference in dry heat loss among three clothing systems was found. In insensible perspiration simulation tests, however, differences in heat loss among the systems were found and particularly the W-clothing system (comprising wool underwear) showed a larger thermal insulation effect at the low temperature.
(2) The C-clothing system (comprising cotton underwear) and the P-clothing system (comprising polypropylene underwear) after sweating showed a larger fall of temperature within the clothing than that of the W-clothing system.
(3) The tendency described above was strengthened with increasing perspiration, and in the C- and P-clothing systems increased dullness of the thermal sensation was found in the wearing tests.
(4) The test results show that the W-clothing system is the most suitable for wear at very low ambient temperatures.
