Abstract
Investigations have been made on the effect of cloth cover on air permeability, testing forty five different fabric samples. In most cases, cloth cover was found inversely proportional to the air permeability. However, several other properties such as yarn count, thread count, weight per unit area and weave pattern have also their due share in the rate of air flow through fabrics. Fine yarn count in combination with very high thread count prevented the passage of more air. Weight per unit area varies inversely with the same property. Weave pattern also influenced air permeability. Plain weave provided more penetration of air while twill and satin weave decreased its rate. Wool fabrics showed different behaviour in this regard. Its felting tendency and some other factors were probably responsible for their contraventional results.
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