What items should I prepare for after beauty treatments? Any recommendations?

Hello, my name is Kwan and I'm planning my first beauty treatment trip to South Korea. I wanted to ask if anyone with experience has any recommendations for things to prepare from home? I'm thinking of bringing items for post-treatment care, like cooling hydrating masks or silicone sheets for scars. I'm curious if you brought these from Thailand or found them there?

I've seen people say the skin needs to breathe but also needs to retain moisture. I'm not sure if general gels for sensitive skin are good. Please let me know which ones actually help. Thank you in advance!