You will need a piece of old sheets, wool yarn and glue.
Cut a piece of fabric to the size of a rug and fringe it at both ends. Cut pieces of wool yarn about 2 cm wider than a piece of fabric.
Using a brush, apply an even layer of glue a few inches apart and press the pieces of yarn tightly next to each other on the fabric.
Allow to dry, preferably under weight. When completely dry, cut off the extra thread ends at the edges.