Tie-dye shirt is a top. Source: Nook Shopping Daily Selection. It costs 800 Bells and sells for 200 Bells. It can also be bought for 720 Poki (Happy Home Paradise). Styles: Active; label themes: everyday, comfy and vacation.
Where to get it
Nook Shopping Daily Selection: The Daily Selection in Nook Shopping at the Nook Stop, a small range of items that changes every day.
