A singlet. This is just a cool word for "leotard."

"Wait…who are all these people?" (Source)

Wrestling shoes. The wrestling mat is gross enough.

Headgear to avoid those nasty cauliflower ears.

Kneepads. For whenever you emotionally sink down onto your knees after winning gloriously…or losing horribly.

The intense desire to pin other people. You won't succeed unless you like to, you know, do what's required for winning.

Geez, you can at least act like you're enjoying yourself. (Source)