Suiting fabric is a type of fabric used to make suits, jackets, and other formal clothing. The most common type of suiting fabric is serge, which is a twill-weave fabric with a smooth, slightly lustrous surface. Serge is usually made from wool, but can also be made from synthetic fibers such as polyester or rayon. It is known for its durability and wrinkle resistance, making it an ideal choice for suits and other formal attire.