Another happy ear plugger chiming in. I have them in every backpack and suitcase now because it makes falling asleep anywhere a fairly consistent experience -- along with an eye mask to be complete. These are the best ones I've found so far:

https://smile.amazon.com/gp/product/B01M6AI2HF/ref=ppx_yo_dt...

I’m a side sleeper and have slept with ear plugs in for nearly the past decade (hard for me to sleep without them now).

I currently use Mack’s ear plugs, but I imagine they are pretty much all the same. Just look for some foam ones. The first couple of times it feels strange, but you get used to it quickly.

i'm a side sleeper who could never use plugs until i found those (not affiliated):

https://www.happyearsearplugs.com

they advertise heavily but for me it's the only ones that dont bother me when im turning at night and they hold forever.

My preference: Honeywell Howard Leight Bilsom 303, of which I use the smaller size. Can be purchased in bulk.