These are modernized Hanbok (Korean traditional Costume).
Traditionally they are made of silk material with different designs (shorter top and wider dress).
The modern ones are basically made for efficiency of movement, washing and maintenance.
Various deep and beautiful colours incline to be used for the traditional silk Hanbok. Whereas, the modern ones tend to be more like earth tone since natural colours from red clay or sand are used.
People generally don’t wear Hanbok anymore unless it’s for special events (weddings) or holidays.
For myself, I can’t remember the last time I wore mine. Probably it was in kindergarten or elementary school for a Korean Fan dance event. lol
You can easily see Hanbok from Insa-dong and I hope you find the one you like! 🙂