Chin straps are devices that are meant to help keep your mouth closed while you sleep. They are adjustable straps that go over your head and around your chin. The idea is that by keeping your mouth shut, you will be less likely to snore. There is some evidence that chin straps can be effective in reducing or eliminating snoring. A study published in the Journal of Clinical Sleep Medicine found that a chin strap was able to reduce or eliminate snoring in 70 percent of participants. Another study, this one published in the International Journal of Otolaryngology, found similar results, with a chin strap reducing or eliminating snoring in 76 percent of participants. While there is some evidence that chin straps can be effective, it’s important to note that they are not a cure for all cases of snoring. If you have been using a chin strap and are still experiencing loud snoring, it’s best to consult with a doctor to find out other possible causes and treatment options.