not an impressive answer here. : ) i’m a musician whose worn earplugs for maybe 20 years now. I’ve used most of what’s out there. custom molded, cheap foam plugs, the ones with …flanges?
my favorite for everything except critical use (like when you need a somewhat linear reduction in volume) are the cheapies.
these get good reduction is volume. btw, don’t take the specs on decibels too seriously. it’s actually hard to measure ( you really need a curve showing reduction at different frequencies). all of the cheap plugs loose more high freq then low. these are no different. the expensive molded plugs are significantly flatter but you don’t need that for sleeping.
i buy a box of these and then i’m good for sleeping, concerts, trains…give some to friends at shows. they gradually loose elasticity and thus effectiveness. discard when you feel like it. i estimate i get maybe 20 uses.
for sleep there is nothing sticking out of your ear so comfortable when you sleep on your side.
they don’t completely get rid of sounds. they more take the harshness off of sounds. this is true of all the plugs. and if your issue is bass…like a club…nothing is going to do much.
so for price, sound reduction, comfort…these are an easy choice for me. last thing…there is a little skill to putting them in. you basically roll one end narrow, insert, and then sometimes i will gently hold in place as it expands to fill ear canal.