Harry Potter went from the loneliest boy in the world to Hogwarts legend in the course of the famous novels. Today he is everyone's favorite boy wizard and loved by so many fans worldwide. The Marauders Map is one of the most intriguing item from the series.To gain access to this mystical map you must utter the words "I Solemnly Swear I Am Up To No Good" and to deactivate it you must utter the short but sweet "Mischief Managed." If you are a fan, you will love this mischief managed t-shirt. This Shirt is made of a super soft 50% polyester / 50% rayon fabric blend.