1. Because it means you won’t have to wear a coat over your coat
A dense fabric like corduroy or flannel battles sinking temperatures better than a wispy wool or viscose-blend. “You’re basically wearing a cardigan all the time,” said Pete Anderson, 38, a communications analyst in Silver Spring, Md., of the flannel suits and tweed jackets he wears in fall. Though you’ll need to toss on a topcoat eventually, a formidable fall suit allows you to stretch those coat-free days through Thanksgiving.
2. Because it has lasting power
Discerning vintage stores stuff their racks with 30-year-old tweed and corduroy suits because sturdier textiles don’t fade or wear out as swiftly as thinner ones. “These clothes can stand up to whatever you throw at them,” said Brendon Babenzien, the founder of New York brand Noah. So they endure: “I want my stuff to be substantial and heavy and long-lasting.”
3. Because it travels well
When he’s on the road, Kirk Miller, the owner of New York haberdashery Miller’s Oath, finds that a lithe suit “gets that crease from where it was folded in your suitcase.” A robust fabric doesn’t wrinkle as easily and when it does, a quick hang near the shower erases those rumples. Plus, a heavyweight set can be broken up easily for more outfit options: A corduroy suit can do triple-duty as a full suit for a meeting, trousers with a sweater on a casual day, and a jacket on the plane over jeans.
4. Because it’s more forgiving
If (read: when) you gain a few pounds at Thanksgiving, a good flannel or cord suit will not cling as closely to your body as that dinky “all-season” paper-thin wool. Light suits have a tendency to wrap your rolls unbecomingly, while a heavier iteration hides them. Trust us, nothing conceals a food baby like a tweed sportcoat.
5. Because it just looks better
“There is no question that in my humble view there is more luster, more life, richer texture, more longevity in a heavier weight cloth,” said Michael Hill, the creative director of Drake’s, a London brand whose fall collection includes a mustard corduroy suit and a houndstooth Harris Tweed sport coat. Cold-weather clothes, in plaid makeups and fuzzy fabrics, evoke everything from the handsome preppy rigs that Ryan O’Neal wore in the 1970s film “Love Story” to the colorful tweed coats that stylish midcentury rakes adopted in winter. “Something like tweed is such a vehicle for texture and color,” said Mr. Hill.