Reddit mentions of Hakugen 3D Humidifying Mask (Orange) #Grapefruit Lemon 3pcs (Grapefruit Lemon)

I try to save some samples of things that I use, but don't necessarily use every single day, so that I can bring them when I travel without having to decant a hundred different "what-if" things. Usually things like AHA/BHA, mucin, wash off masks, and eye creams. It's nice to have more than a bare bones travel selection of skincare and to know that I can slap on a clay mask or a cream mask if my skin is needing it.
I have a pack of ken go doh spa wipes if it's a long flight. I do a full routine and light sleeping mask before headed to the airport, and mid-flight if I'm feeling kind of grimy, I'll wipe it off and do a sheet mask. Feels much better than having to wait until I get to accommodations to clean up.
Definitely hand wipes to clean my hands/all around me (trays, window frames, buttons, etc). And masks to wear! Last international trip I had the Pitta foam masks that I wore for being in the airport, those were super comfortable to wear. I also brought some of the hydrating ones (yuzu scent) because the cabin air gets so dry. Highly recommend. Even just a basic face mask will do a lot for keeping moisture in!