I just got back from Korea for the holidays (Christmas and New Year's Break) and let me share my experiences and outfit choices!
Day 1: Airport Hopping
Lunching at Hong Kong International Airport
Day 2: Shop 'til you drop!
Namdaemun Market + Myeong-Dong + Dongdaemun Market
Weather: from -5'c to 2'c
Day 3: Primitive Revival + COEX Mall
Our itinerary got messed up because I got sick that day :(
Day 4: Temple Run
Changdeokgung Palace + Gyeongbokgung + NSeoul Tower