Core spun threads consist of a core thread which makes the sewing thread robust and a wrap which gives the thread its characteristic textile texture. This texture is typically given by the hairy and thus matt appearance. Core spun threads are usually made of a single material. However, there are also mixed threads which consist, for example, of a polyester core and a cotton wrap. An advantage of these polyester-cotton threads is the cotton wrap. It enables the needle to cool down more quickly and the sewing thread itself to be sewn at high speeds.