A characteristic often associated with linen yarn is the presence of slubs, or small, soft, irregular lumps, which occur randomly along its length. In the past, slubs were traditionally considered to be defects, and were associated with low quality linen. However, in the case of many present-day linen fabrics, particularly in the decorative furnishing industry, slubs are considered as part of the aesthetic appeal of an expensive natural product. In addition, slubs do not compromise the integrity of the fabric, and therefore they are not viewed as a defect. However, the very finest linen has very consistent diameter threads, with no slubs at all.