고 돌아다니다

walk around wearing something

돌아다니다 is going about with no single destination — wandering, getting around town. Five of these lines pair it with 입고: 추리닝 입고 돌아다니는 일은 거의 없구나 "so you basically never go about in tracksuit bottoms", 이 정도 입고 돌아다니기 좋은 날씨다 "perfect weather for going around dressed like this". What you have on while out and about is what people mostly use it for. Compare plain 다니다, which implies a regular route or somewhere you attend.