Before you can begin to train your gun dog using real birds, you must master marks and retrieves with bumpers or dummies. The Canvas Dummy is perfect for getting your puppies acquainted with retrieving. Made of canvas-covered closed-cell foam with poly rope sewn into the dummy, these dummies will not sink. Dokken’s™ Super Dummies are made from the same durable, scent-injectable natural feel foam as the Dokken’s™ DeadFowl Trainers. Dokken canvas training bumpers are equipped with a yellow throw rope and are the ideal weight for long-distance throws.