Ken Bone, whose outfit grabbed attention when he asked an audience question at the second presidential debate, said Monday that the red sweater wasn't his first choice.

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"I had a really nice olive suit that I love a great deal, and my mother would have been very proud to see me wearing on television," Bone said in an interview on CNN.

"But apparently I've gained about 30 pounds, and when I went to get in my car the morning of the debate, I split the seat of my pants all the way open," he continued.

"So the red sweater is Plan B. And I'm glad it worked out."

Bone asked a question during Sunday night's presidential debate about energy policy — and quickly became popular on social media.

"What steps will your energy policy take to meet our energy needs, while at the same time remaining environmentally friendly and minimizing job layoffs?" Bone asked during the debate.

Several people tweeted about Bone following the debate, with one Twitter user advising people how to make a "Ken Bone Halloween costume."

Bone wore the now-famous sweater again during his CNN interview on Monday.

"I don't see how I could not have worn the red sweater this morning," he said at the beginning of the interview.

"It's more famous than me. I just had to bring myself along."

Bone, who is still undecided about whom he will vote for, also urged people to cast their ballots in November.

"Even if you feel like your vote does not matter, it does," Bone said. "Make your voice heard."