Super Bowl 2015: The Journey of the Game Footballs

A behind-the-scenes look at how they are kept.

Along with Katy Perry's costumes, the footballs will go through security as well, which will be even more rigorous this year.

Here's a timeline of where the Super Bowl footballs have been and are going:

January 2015:

Monday, January 19:

The large volume of footballs is due to charity commitments for game-used balls, Blandino said.

"The teams do practice with those footballs," Blandino said on Thursday. "They prepare them, and then we take custody of those footballs on Friday [Jan. 30]."

Sunday, January 25:

Kicker footballs are sealed in boxes and shipped directly to the NFL official hotel one week prior to the Super Bowl. “K balls” are marked by a small "k" inscription.

Friday, January 30:

"Tony Medlin, who is the equipment manager for the Chicago Bears, has been doing this for a long time," Blandino said. "He has custody of the footballs, and he will have the footballs on Friday.

Medlin has worked in equipment with the Bears since 1987 and he's in his 18th as the team's head equipment manager, according to his profile on the Bears' website.

For the Bears, he's responsible for coordinating "equipment operations including logistics, purchasing and inventory, for all players, coaches and staff," the profile states.

Super Bowl Game Day

Sunday, Feb. 1, 3:30 p.m.:

The balls will remain with Medlin and the NFL with the added security until about three hours prior to the game.

"Then, [Medlin] will bring them to the officials locker room to be tested," Blandino said.

At that time, referee Bill Vinovich will test each ball to ensure it is within the NFL's allowable range of 12.5-13.5 pounds per square inch.

"We inspect them, we gauge them and basically approve or disapprove of the footballs," Blandino said. "That process is no different than any other Super Bowl. There will be some security just because of the environment that we’re in for this game. There really is no change in terms of the protocol for the Super Bowl.”

Sunday, Feb. 1, 4 p.m.:

NFL personnel deliver the kicker balls to the official’s room approximately 2.5 hours before kickoff, according to Wilson.

Sometime before kickoff, "Tony will take possession back, and the balls will be taken to the field and given to the ball boys for the game," Blandino said.

Kick-off is at 6:30 p.m. ET at the University of Phoenix Stadium in Glendale, Arizona.