Plain Cotton Sinker Fabric is a type of woven fabric made from cotton fibers, using the sinker weaving technique. The term sinker refers to a process used in weaving where a sinker component helps to position and secure the yarns, creating a stable and even fabric. In the case of plain cotton sinker fabric, the structure is typically plain weave, meaning that the yarns are interlaced in a simple over-and-under pattern. It is maily used in round neck t-shirts, collar t-shirts as well as undergarments.