The gown needs to be rented as that is the official traditional dress that all students must wear during their graduation.

The cap and the tassel however will be yours to keep. Again, this is part of the official graduation outfit and so must be worn during the ceremony. 

You will be able to pay for the rent and deposit of the gown online. 

At the kick-off on July 2nd, you can pick up your cap and gown and have an official portrait picture taken.