What To Wear Under A Sports Jacket

Let’s be honest: the sports jacket is the mullet of men’s fashion. Business in the front, party on the shoulders. But what happens underneath that noble beast can turn your look from “distinguished professor” to “guy who wrestled a vending machine.”

Your base layer is not a suggestion—it’s a contract with society. Wear the wrong thing, and your jacket will betray you like a bad Wi-Fi signal. Ready to dive into the deep end of undershirt diplomacy?

The Casual Crusader: T-Shirts (Yes, You Can)

A plain, high-quality crewneck tee can work, but only if your jacket is unstructured (read: no shoulder pads that could double as kneecaps). Think of it as the leather jacket’s awkward cousin who brings a guitar to a dinner party.

Rule one: no graphic tees with puff paint or ironic slogans. Your jacket is not a billboard for your love of extinct amphibians. Stick to solid colors—navy, charcoal, or a white so bright it could signal passing aircraft.

Surprising fact: James Bond wore a T-shirt under a sports jacket exactly once in the entire film franchise. It was a scandal. Bond literally got beaten up in that scene. Coincidence? I think not.

The Button-Up Ballet: Oxfords and Popovers

Here’s where we enter the Goldilocks Zone. A button-down shirt is the safe, responsible choice—like ordering a salad when you secretly want fries. But which button-down?

An Oxford cloth button-down (OCBD) is the holy grail. Its collar rolls like a gentle wave, and it says, “I might own a boat, or I might just have good taste in thrift stores.” Avoid anything with a spread collar so wide it looks like a bat signal.

Now, the popover shirt—a button-down with only three buttons and a half-placket. It’s the shirt equivalent of a mullet haircut: work-hard, play-hard. Wear it unbuttoned at the top for a breezy, “I just solved a crossword puzzle” vibe.

The Undershirt Trap

Should you wear an undershirt? Yes, but only if the person you’re dating will never see it. Wear a V-neck that hides deeper than a spy’s identity. If your undershirt peeks out, you look like an accountant who eats glue.

Pro tip: white undershirts are for funerals and prison. Okay, not really, but a gray or nude undershirt disappears under white dress shirts like a ninja in a snowstorm. Don’t let your undershirt scream louder than your personality.

The Knit Wit: Sweaters and Polos

Imagine wearing a thin cashmere sweater under your jacket. You’re warm, you’re classy, and you smell like a library in November. This is the “smart-casual god tier.” Just don’t pick a sweater so bulky you look like a fridge wearing a blazer.

Polos are the diplomats of the under-jacket world. A fine-gauge cotton polo (not the kind your dad wears to mow the lawn) sits perfectly under a jacket. Collar up is for tennis legends and dudes in convertible cars. Keep it down, Franco.

Surprising fact: The polo shirt was invented in 1928 by a French tennis player who got tired of traditional button-ups. He basically said, “Let’s make shirts that don’t make me sweat like a burrito in a microwave.” Thank you, René Lacoste, for your service.

The Dark Arts: No-Nos and Neutrals

Never, ever wear a turtleneck under a sports jacket unless you’re reading poetry aloud in black-and-white film. Turtlenecks are for villains and the cast of Mad Men flashbacks. You are neither.

Avoid polyester like it’s an ex at a wedding. Polyester under a jacket creates static cling so powerful it could power a small fan. Stick to natural fibers: cotton, linen, wool, or a blend that breathes like a yoga instructor.

Lastly, match your jacket’s era to your shirt. A 1970s plaid jacket with a slim-fit modern dress shirt is like putting a rocket engine on a tricycle. Embrace the chaos or keep it simple. Your call.

Remember: the jacket is the frame, but what’s underneath is the art. Don’t hang a masterpiece—or a chaotic doodle—inside a frame that’s fighting for attention. Now go forth and unbutton wisely.