Postman's Hat

Link obtains this symbol of service from the postman after Link gets him to deliver Kafei's Letter to Madame Aroma. With it, Link can look inside mailboxes and steal their items. (The first item he finds is a Piece of Heart, but after that he finds only green rupees) The Postman's Hat is one of the masks needed to get the all-powerful Fierce Deity Mask.