"You have to fully invest. If not, you're just another sweaty dude," said Jon "Jersey" Goldman on wearing the Hey Reb! suit. He's featured in the new Hulu documentary series, Behind the Mask, which premiers Oct. 29.

The series followed Goldman and three other mascots for nearly a year, capturing the highs and lows of donning the heavy suits. Goldman hung up the mustache after six years when he graduated last spring. He is now a local radio personality.