Kevin O'Leary says he buys $29 Walmart jeans — but admits to spending $120 on a single pair of boxers

Kevin O'Leary has made his frugality almost as famous as his bluntness. The Shark Tank investor recently went viral standing in a Walmart aisle, comparing Bounty paper towel pack sizes and showing off the $29 black jeans he wears regularly. "Inflation affects all of us," he said in the Instagram video. "Saving dough is the name of the game ."

But there's a category where Mr. Wonderful doesn't save dough, and it will surprise you.

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"My underwear cost $120 each," O'Leary told CNBC Make It in 2018. "I love them ."

He buys Egyptian cotton boxers from Zimmerli of Switzerland, which has been handcrafting underwear since 1871.

Adjusted for inflation, that $120 he spent eight years ago is actually around $160 today.