Double Knotted

When a hand-knotted rug is double knotted, it means that the weavers use a technique where two knots are tied on each pair of warp threads instead of one. This type of knotting adds extra durability and strength to the rug, making it more robust and long-lasting. 

Double knots are commonly associated with certain types of Persian or Turkish rugs, where the design and tradition emphasize resilience and intricate detailing.