According to apparel maker Tommy John, nearly half of Americans have worn the same pair of underwear for two or more days. It’s recommended changing more than once a day if you’ve been to the gym or are heading out on a date, or least wash them after every wear.
Tommy John found that men were 2.5 times more likely than women to wear unwashed underwear for a week or more. That’s 20% of men versus 8% of women. And its recommended you should never keep your underwear for more than a year. It’s a good idea to change out your underwear every six months to a year, due to the fact they accumulate microorganisms and fungi that can lead to yeast infections or urinary tract infections.
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