Originally Posted by The Louche
What exactly is serge anyhow? I thought serge was basically the same thing as gabardine: heavy twill.
I believe serge is the same thing as plain twill (2 up, 2 down). The cloth looks the same on either side, except for the direction of the twill lines. Gabardine is a warp-faced twill (like denim). The warp threads cover more of the front of the cloth, and the weft threads cover more of the back. Denim for jeans normally has blue warp threads and white weft threads, which is why the inside of the cloth is so much lighter than the outside. The same can be done with gabardine, though it is often made in a single color.