Mack’s Ear Plugs. They are silicone putty, therefore moldable, and comfortable for side-sleeping. I use them every night and they are the best ear plugs for sleeping I’ve tried.
Somnifix. Somnifix is a sleep strip that improves sleep quality and reduces snoring by keeping the mouth closed during sleep. Even if you don’t snore, using Somnifix encourages you to nose-breath while you sleep, leading to increased sleep quality.