http://www.ewtnnews.com/catholic-news/Vatican.php?id=7113

Pope Benedict XVI, after his retirement at 8.00 pm on Thursday, 28 February 2013, will be known as the Bishop Emeritus of Rome, and therefore can be addressed as such, as His Holiness Benedict XVI, Pope Emeritus, or Roman Pontiff Emeritus.

Pope Benedict XVI will also abandon his red papal shoes and wear a brown shoes given to him at Leon, Mexico, and he will also wear a white cassock as he wear now, but without the shoulder cape or more appropriately known as the pellegrini (not mozzetta as mentioned here, as mozzetta is of a very different type, and red in colour for Popes).

He will also wear the Episcopal ring he had from the time when he was Cardinal Ratzinger (given by Pope Paul VI in 1977), as the Ring of the Fisherman he received in 2005 will be destroyed, similar to what happened when a Pope passed away.