Liquid resistant/repellent surfaces are important in many textile applications, especially for the outermost layer. The Cassie-Baxter model is a geometrical model depicting the liquid behavior of a rough surface and predicting the liquid resistance of a surface by calculating the apparent contact angle. The Cassie-Baxter model has been used to develop a geometrical model of woven fabric to define the surface performance of its liquid repellency. However, current geometrical models do not consider yarn flattening, which is observed in actual woven fabrics. A model reflecting the actual geometry of woven fabric should predict liquid wetting more accurately. This study extended the Cassie-Baxter model of woven fabrics to include the yarn flattening factor, e. This theory predicts that the fabric contact angle, theta(F), decreases as yarn flattening proceeds by increasing the contact area of a liquid on a fabric surface. Different weave structures also influence the contact angle, theta(F). When the yarn contact angle is theta(y) >= 113 degrees and e <= 1, the fabric contact angles of the fabrics studied were the highest for plain woven fabric, lower in 2/2 basket, and lowest in 2/1 twill. These predictions are in good agreement with experimental results on manufactured woven fabrics, which varied in their yarn flattening and their different weave structures; they exhibited the same trends as predicted in the models. GRAPHICAL ABSTRACT Yarn compression and its impact on the liquid resistant/repellent surface property were demonstrated by modeling the structural geometry of the lenticular yarn (compressed yarn) in regard to the liquid contact area against the woven fabric surface. As the yarn is compressed, the major axis of a warp or weft yarn, a, increases, while the minor axis, b, decreases. This changes the liquid-fabric contact angle, which is dependent on the liquid surface tension (determining he and a) and the local surface geometry. [GRAPHICS]