What conditional products did you bring on your beauty journey, dear husbands?

I'm planning to go to Seoul this month and get a couple of beauty procedures done. Since I'll be out and about more than I am at home, good travel-friendly products are essential.

It would be great to bring some items from Mongolia. For example, could I bring foot masks, silicone heel protectors, or a calming gel for irritation? What products did you bring, and were they really helpful? Did you buy them online or at a bookstore nearby?

I'm sure there are others traveling like this. What did you bring, and in retrospect, what would you have done differently? I'm looking for good recommendations, not just the basics.