Most of the comfort studies carried out at Kansas State University (KSU) have been conducted with subjects clothed in the KSU standard uniform. A standard uniform was used to remove clothing as a variable in the tests so that the effects of the other important thermal variables could be established. Now that this is largely completed, it is important to consider clothing as a variable to extend the comfort data to more realistic conditions. To do this it is necessary to identify clothing ensembles commonly worn in an indoor environment, to measure the thermal insulating value of representative ensembles and finally to determine the effect of thermal insulating value on comfort. This paper is concerned with identification and thermal evaluation of typical clothing ensembles; a later paper will discuss the related thermal comfort study.