Cool dads got all their vacation shirts stolen from them this year when their sons got a hold of their stash. Who knew that huge hibiscus flowers printed on short sleeve rayon shirts would go from embarrassing to awesome? Outside of the vintage versions that came back via thrift stores and fatherly closets, on-trend brands brought the piece back in a modern way. Our favorite: the Hawaiian shirt from BAPE and Undefeated's spring/summer 2012 collection.