All you have to do is buy the Helmet and you get the Costume inside with instructions on how to wear it.
Currently the Costumes available are Darth Vader, Boba Fett, and a Storm Trooper. The 4th on the list is an Xwing pilot for those that wish to wait for that one
.If anyone has a suggestion for a costume, let me know...I may add yours to the list
.See ya in the World!