Scientists investigated the effects of yarn type and twist levels of warp and weft on the hand and permeability to air and moisture of test fabrics woven from both open end yarns and ring spun yarns. Researchers produced 16 woven fabric samples made from different types of 65/35 polyester/cotton blends and tested the fabrics for absorbency, air permeability, flexural rigidity, and coefficient of friction. Results indicated that both yarn type and twist levels of open end spun yarns significantly affected fabric properties. A higher twist factor of the open end spun yarns resulted in fabrics exhibiting a much greaten degree of air permeability and a smoother hand. Lower twist factors promoted higher degrees of absorbency and roughness. Test fabrics woven from warp and weft open end yarns exhibited higher absorbency, whereas fabrics woven from warp and weft ring spun yarns displayed higher air permeability, coefficient of friction, and flexural rigidity. 20 refs.