Mouth tape encourages nasal breathing by gently keeping your mouth closed during sleep. Nasal breathing is crucial because it enhances oxygen absorption, which can improve sleep quality and overall health. When you breathe through your nose, nitric oxide is produced, which helps to increase blood flow and oxygen delivery to your cells. This leads to deeper, more restorative sleep. Additionally, nasal breathing reduces the likelihood of snoring by promoting a clear airway and preventing the vibration of tissues in the throat.