(Hand-Woven Reversible Southwestern Design Kilim Wool Rug (Size 5.0 X 6.11) Brrsf. by 14 ft. 0 in.). What Makes A Hand-Knotted Rug So Strong?. Machine-made rugs are made within hours. 2- Hand-Knotted rugs are built with natural fibers, such as Wool, Silk, Cotton and Bamboo.