This term denotes yarn that has been wound into a large coil or skein. It is typically untwisted and must be wound into a ball or onto a cone before it can be used for knitting, crocheting, or weaving. Imagine a continuous loop of yarn, neatly arranged and loosely tied together to maintain its shape during storage and transport; this represents the general form.
Yarn presented in this form often indicates a higher quality or artisanal production. This packaging method can reduce stress on the fibers during storage, potentially preserving their integrity. Historically, it was a common method for distributing yarn before the widespread adoption of cones and balls. It is also favored by dyers as it allows for better dye penetration.