In Myeongdong, go to Daiso Myeongdong Main (43 Myeongdong-gil) or Myeongdong

Station (134-1 Toegye-ro), 10am–10pm; bigger stores stock more. The Zero Gray black shampoo set is ₩3,000 (8,000 orders) and the gray-hair tattoo brush is ₩1,000. The 300ml shampoo is over 100ml, so check it in.