Matthew McConaughey gets older, but these fanny packs stay the same rage.

The “True Detective” star brought his son to Sunday’s Red Sox-Astros game at Fenway Park, where he monologued about his love of the hip-hugging zipper pouch.

“I’m not afraid of the fanny pack,” he said. “You gotta kinda put it on the side to make it look a little not as nerdy, but still, practicality wins out. I got so much gear in here that I don’t want in my pockets.”

CSN Houston’s Julia Morales, dazed and only a little confused, told McConaughey she too loves the fanny pack.

“Keep doing it, keep wearing it,” the Texas native drawled. “They’ll come back, some decade from now.”

More On This...

Time is a flat circle, indeed.

Go to The Post for video of the interview.