Look,
http://www.howardleight.com/earplugs/super-leight--2 is easily one of the top options globally—we're talking a 33 dB NRR. If you check that site, you'll see several different models, so you can pick whatever fits your ears best. Just grab them via Amazon. They come in a tiny, lightweight package, which is key because shipping won't break the bank; they just show up right at your doorstep in a standard envelope. It's a solid setup. When they get dirty, just toss them in a mesh laundry bag and throw them in the washing machine. Boom. They're good for a few more rounds.
Now, if you’re actually talking about headphones instead of earplugs, they carry those too (though I have no clue how anyone sleeps with those strapped to their head. Honestly, why?)