The top 7 fall trends for men, according to clothing subscription service Bombfell

While skinny pants have dominated for the last decade or so, this fall is all about relaxed fits, Su said. Relaxed silhouettes can still look tailored, she said, and are what many men might be happier wearing anyway.

"What we also see now is the rise in 'athletic fit,' which is roomier in the thighs but tapered at the bottom," Su said. "Guys really love that too because it gives you a tailored, polished look but it's still very comfortable."

Su said Bombfell has noticed a rise in T-shirts and sweaters instead of woven button-down shirts. This is driven by the fact that workplaces are becoming more and more casual, she said.

"Knits are just much more comfortable — there's a lot of stretch, there's a lot of flexibility," Su said. "For a modern lifestyle where you're commuting or you're running around with your kids or you're going to the gym after work, comfort is the No. 1 thing."

"It's not strict athleisure where people are wearing track pants," Su said. "It's about taking some of those performance qualities and wearing them in a way that's dressy but works for modern life."

In the summer, shorts that doubled as swim trunks — called "beach-to-bar" shorts — were popular on Bombfell. For fall, Su recommends shirting in performance fabrics that can stretch and handle moisture-wicking, or sweaters that are inspired by sweatshirt shapes.

"Texture gives a lot of depth and life to a garment," Su said. "Something might be a pretty solid color, but making it out of a textured fabric makes it look a little more organic and natural."

Textured fabrics "elevate" the garment, Su said, and invite you to look closer. She recommended slub fabrics, mélange fabrics, and anything with an interesting knit.

"We used to sell way more pants than jeans, but now they're becoming neck-in-neck," Su said.

Su said Bombfell has noticed more innovation in the denim itself, like stretch or special fabrics to increase comfort.

"A classic staple in a guy's closets is khaki pants, but we've found this season is that we're really straying more toward a tobacco color — really warm khaki," Su said. "And guys always wear navy pants, but this year we're trying navy pants with a more teal cast, like a sort of rich jewel tone."

Su also mentioned that dusty, faded Earth tones — almost like a sun-bleached effect — are also popular for fall.