A more effective variant of the over-the-mouth gag is called the cleave gag. Instead of being tied over the person’s mouth, the scarf or cloth is pulled between his or her teeth. While such a gag of thin material is not very effective, a thick scarf can be used to hold his or her mouth open. The tighter the gag is tied, the better it works; however, no matter how tightly it is tied, the gagged person can usually spit it out. When it is applied properly, the gagged person’s speech is muffled, but not completely silenced.