Imagine the good life—you know, one enjoyed by a stylish man of some means. He’s wealthy; the “how” is unclear. When it’s warm, he wears straight-fit white pants, boat shoes, and crisp Hawaiian shirts. He sports a classic Rolex, but nothing too ostentatious—a GMT Master, say. On more adventurous days, he drives a classic red Ferrari. He lives in a spacious home, somewhere that never requires down-filled outerwear. When he’s feeling casual, he opts for shorts, army shirts, and his favorite baseball cap. He has a job, kind of—one he does because he loves it, not because he needs to. It’s easy enough to imagine this man in 2020: you probably follow him on Instagram. And yet the guy I’ve got in mind first appeared on screen 40 years ago. I’m talking, of course, about Tom Selleck’s character on Magnum, P.I. Because, in 2020, there really is no better source of style inspiration than Mr. Thomas Magnum himself.

Magnum, P.I. debuted in 1980, a month after Ronald Reagan won the presidency. The economy was booming, and TV, which four years later would also include shows like Miami Vice, was a mirror for its time. Thomas Magnum was the perfect leading man to represent that early-’80s optimism. The dude was a war veteran and lived in Hawaii in a mansion—rent free!—on the condition that he did some private investigating every now and then. (Occasionally, he’d have to beg to use the wine cellar, but, you know, who hasn’t?)

But the Magnum P.I. lifestyle of fun in the sun is just one aspect of what makes Thomas Magnum a source of modern style inspiration. So let’s talk about Magnum’s stuff, starting with his threads. You quite literally could take his wardrobe, which consisted of those Hawaiian shirts, light wash jeans, army shirts, a Detroit Tigers fitted, boat shoes, and trim swim trunks, and drop them into your modern day Rimowa luggage without so much as altering a hemline. (Okay, maybe some of the jeans were a little tight in the hips.) Of course, in 2020, I wouldn’t be surprised to see shirts in Magnum’s closet fetch Prada-level prices, while his army shirt and fitted cap seem predictive of Jerry Lorenzo’s sporty, dimly-lit Fear of God. But at a time when the short-sleeve printed shirt has usurped the T-shirt as the go-to piece for any warm-weather flexing, you’d be hard-pressed find a better line-up than Magnum’s.