This beautiful rug is made of 4,5 mm polyester cord. Such a cord does not stretch like a normal crocheted cord, while remaining flexible and comfortable for crochet carpets. The polyester cord retains the shape very well and will continue to do so for years. Despite its "terrible" name - polyester - the cord is very practical - it is hypoallergenic, it is easier to wash and dry, and, most importantly, polyester cord is cheaper than cotton cord. A carpet of the same size, crocheted f...