Buy this. Skip the rest.

Every sleep earplug is either foam or silicone, and they are good at opposite things. Foam expands inside the canal and blocks the most noise, especially the low rumbling frequencies that snoring actually lives in. Silicone sits flatter and is far more comfortable when your ear is pressed into a pillow all night.

Your problem is snoring in a shared bunk, and no commander can stop that the way they stop talking. So foam is your primary. Get the silicone as the comfort backup for nights the foam annoys you.

The number to look for is NRR, printed on every box. NRR 32-33 is the top of what exists. Anything advertising NRR 20 is not going to do the job.

Ignore anything marketed as "high fidelity", "concert", "musician" or "Loop Experience". Those are designed to let sound through at lower volume. Wrong tool.

You asked whether it is legit and whether it will last. I searched again and nobody can answer that, including me. Zero independent reviews exist anywhere. No comparison test, no third party writeup, no Reddit thread, no stated warranty. Both colours still sold out on their own site.

Compare that to the Loop earplugs above: 13,676 reviews at 4.2 stars. That is what "verified to last" actually looks like. Dusk & Noah might be excellent. There is simply no evidence either way, and you have four days.

And you already have better information than any review: you have used one before and it worked. First-hand experience of a product beats an unreviewed $58 brand every time. The only problem with your old one is the shipping time from China, which does not fit four days.

⇒ Buy the same style locally on Shopee so it arrives in time. Search a contoured or 3D blackout mask with a few thousand reviews. $15-25. If you love it, reorder the China one later for camp.

$58 is a markdown off a $116 "regular price" that nothing suggests anyone pays. That is not a reason to avoid it on cost — it is a reason to distrust the signal. The medical-sounding claims on the page are marketing copy.

A sleep mask has exactly three jobs: block light at the nose bridge where every cheap one leaks, contoured cups so there is no pressure on your eyeballs, and a strap that does not slide. All three are solved at $15-20 by masks with thousands of real reviews.

You are not being cheap by skipping it, you are avoiding an unreviewed product five days before you need it to work every night for nine weeks. Buy one proven contoured mask and be done.

Calibration: the mask matters less than the earplugs anyway. Lights out at 2230 means the bunk is dark already. The mask handles corridor light, other people's screens and early sun. The earplugs handle a problem nothing else touches.