just a long piece of fleece. Tie a knot in it every 10-12". the finished piece can be anywhere from 1 foot to 4 foot long. My Basset Hound loves running thru the yard at full speed with his rope flying! The only thing he likes better is when one of the other dogs grabs an end and plays tug with him. Best part for people? 100% washable AND doesn't fall apart if left in the rain!