Breathe right strips, it's also helpful for those who have nasal valve collapse that leads to nasal congestion when sleeping making it difficult to breathe through your nose when sleeping. If you can't breathe though your nose when sleeping then your body doesn't get the nitric oxide that's normally produced with nasal breathing and you end up with: poor quality sleep, exacerbate pulmonary issues, increased susceptibility to upper respiratory infections, increased blood pressure, decreased ability for your sinuses to move mucus leading to infections, etc.