what does Byron say wool pooh is?

The Wool Pooh is the novel's most prominent symbol. For Kenny, the Wool Pooh symbolizes death, acting much like a grim reaper figure. Kenny encounters the Wool Pooh twice -- once when he nearly drowns at Collier's Landing, and again at the bombed church. Even at the end of the novel, he is convinced of the existence of the Wool Pooh. This symbol has made Kenny more aware of death, while before he appeared to harbor a typically childlike illusion of invincibility.