1138 Is it a sack race if it's not burlap?

My eye caught the color photo on the front page of our community paper of three children in a summer recreation program participating in a "sack race." In plastic bags! I was horrified. Everyone knows you must have a gunnysack for a sack race. And I don't mean those teensy imposters made of high tech fabric that walkers strap around their middles. Real gunnysacks are made of burlap or jute. They have advertising. They are stinky from half rotten potatoes. They are dirty and the crude falls in your shoes. They scratch the heck out of your legs, naked in summer shorts, so that you hop even faster to get it over with. At least, that's how I remember it. Plastic bags indeed!