Water vapor buffering of hygroscopic fabrics during wear has been studied using both theoretical modeling and wear trials. Both theoretical predictions and experimental observations demonstrate that highly hygroscopic wool fabrics absorb significantly more sweat than fabrics of very low hygroscopicity, such as polyester, during a period of exercise following rest. The wool fabric removes more moisture from the microclimate than polyester, and reduces the perceived discomfort caused by moisture buildup on the skin under wear trial conditions. The prediction technique is applied to previously reported wear trials, and used to explain the results observed under different wear conditions. Hygroscopic buffering is effective during wear under dry environmental conditions in combination with light to moderate physical activity.
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