Established about a decade ago, Mr. Turk has had a slow-burn build into its status as a serious contender in the casualyet-chic menswear realm.

An offshoot of Trina Turk’s eponymous upscale women’s line, it is headed by . . . well . . . Mr. Turk — a.k.a. Jonathan Skow, Trina’s husband of 30 years. “We began the line almost informally to include men’s pieces as props in photo shoots,” Skow says. Those pieces eventually wound up in window displays at Turk’s Palm Springs flagship — and ultimately evolved into a complete collection.

Today, Mr. Turk is sold in more than 30 boutiques nationwide (compared to a whopping 800 for the Trina Turk label) and includes everything from shirts and shorts to slacks, suiting — and even signature jumpsuits. Skow’s quirky designs are (nearly) seasonless — conveying an urbane sophistication that references both the beach and the boardroom.

“Our ethos is pool parties and cocktail parties; a social guy who wants to stand out and have fun,” Skow says. “But we’re also crisp and pressed, and never washed out.” It’s a look Skow places front-and-center on his popular Instagram and Tumblr feeds, which have helped Mr. Turk increase brand awareness within its coveted, millennial digital demographic — not to mention “do an incredible online business.”

For fall, Mr. Turk is heavy on camouflage-pattern pants and blazers; body-conscious, aviator-style jumpsuits; and Rat Pack-esque polos. They’re unique pieces that won’t appeal to everyone — but then that’s just how Skow wants it. “Our business is still small and slow-growing,” he says. “Our fans are into fashion — they want clothes they can get excited about.”