Fabrics are matched for type, weight and composition. Cotton is used with cotton. Most rugs are a blend of poly-cottons. One rug was made entirely out of terrycloth another entirely out of denim.
The rugs are incredibly sturdy. A three strand braid is woven together with a strong cord. The white cord, with a zig-zag running through it can be seen in the picture below. However, the weaving process conceals it entirely. A crochet hook makes the work possible. The only machine sewing that is done is to sew the long strands together, creating a rug of a tightly woven, single, long braid. The rugs lay flat but can be quite bulky for shipping.