Bulky yarn is made of air-formed polyester silk and is not twisted. Therefore, it is softer than regular yarn. Even though it is used for stretchy seams, the individual fibers are not inherently stretchy. The stretch is created by the crimping of the individual threads and the resulting fluffiness. Due to its soft, fibrous structure, bulky yarn lies much more comfortably when sewn. Cover...

Bulky yarn is made of air-formed polyester silk and is not twisted. Therefore, it is softer than regular yarn. Even though it is used for stretchy seams, the individual fibers are not inherently stretchy. The stretch is created by the crimping of the individual threads and the resulting fluffiness. Due to its soft, fibrous structure, bulky yarn lies much more comfortably when sewn. Cover...