What did you bring with you for post-treatment care in Korea?

Hi, this is Mana. I'm planning a beauty trip to Korea next month, and I'd like to ask for advice on aftercare products.

I want to bring something so I can take care of my skin myself for the few days before I return home. There are so many options, like cooling sheets, silicone sheets, soothing gels, etc. What did any of you actually bring? I'd especially like to know if there was anything that was useful on the plane or after returning home.

I know what you need will vary depending on the treatment, but if you could share any experiences like "I'm glad I brought this" or "I didn't use this as much as I thought I would," I'd really appreciate it. I have limited luggage space, so I want to carefully select only the essentials. Thank you!