Just put your hand in the flue and you’ll be astonished by how strong the chimney draught is. This escaping air needs to be replaced, so cold air is pulled in from under doors and round windows, creating the cold draughts we feel. Now you can stop chimney draughts and reduce chimney heat loss with a Chimney Sheep®! The Chimney Sheep® is a thick layer of felted wool on a handle that plugs the gap just above the fireplace preventing warm air from escaping up the chimney and stopping cold air from coming down the chimney.