Anti-snoring pillows turn the head to the side position. You can thus prevent snoring caused by sleeping on your back. Anti-snoring pillows are typically wave-shaped: they are significantly higher in the middle than on the sides. This results in the head turning to the side position during sleep. The tongue can then no longer slide down the back of the throat and narrow the airways (which causes snoring). Anti-snoring pillows are inconspicuous, comfortable and are probably the best known positional therapy aids for snoring.