Boucle or Crewel is a type of YARN used in knitting and crochet. It is characterized by its looped texture, which gives it a unique look and feel. Boucle or Crewel YARN is often used to create garments with a more casual look, such as sweaters, cardigans, and hats. It is also popular for making accessories like scarves and shawls. The looped texture of the YARN makes it ideal for creating intricate patterns and designs.