"Transitional jackets" are the Goldilocks of outerwear—they're neither too heavy nor too light, but just right . They hit the sweet spot of being insulated enough to act as a buffer against crisp autumnal breezes without the risk of overheating. But among the usual suspects (denim jackets, motos, bombers , cargos, and so on), the surprise sleeper of the season is the duster, a lightweight coat that's similar to a trench in weight, but longer in length and more fluid in shape.
And we get why the celebrities are into it. The shin-grazing topper has all the qualities of a robe (but one that you can wear out in public, obviously)—it's comfortable, it envelops you like a hug, and it flutters behind you every step. So it makes sense that the stars have been wearing theirs everywhere, from flights to a night out to the red carpet. To get the exact look, we performed our magic, identified eight celebrity outfits, and located where to buy them. You're welcome.
1. Rosie Huntington-Whiteley
A peachy satin coat pops against an all-black canvas. Her outfit breakdown: Rosie Huntington-Whiteley in Paige Transcend Hoxton High Rise Ultra Skinny Jeans in Black Shadow, $179; fwrd.com , a James Perse Sheer Slub crew neck tee, $75; jamesperse.com , with Saint Laurent sunglasses, nordstrom.com for similar styles, and a Celine bag, celine.com .
2. Selena Gomez
A coated leather coat is so slick in a color as cheery as not-so-mellow yellow. Her outfit breakdown: Selena Gomez in The Row scoop neck classic tee, $320; neimanmarcus.com with The Row coat, neimanmarcus.com for similar color and Vetements jeans, $1,460; shop.alchemist.miami , complete with Manolo Blahnik BB pumps, $595; barneys.com .
3. Gigi Hadid
Add polish to a ripped tee and destroyed jeans with a sophisticated suede topper. Her outfit breakdown : Gigi Hadid in an Unravel tee, fwrd.com for similar styles, a Smythe wrap trench, $758; thirdstreethabit.com , and Rag & Bone The Boyfriend Jeans in Milton, net-a-porter.com for similar styles, complete with a Lili Claspe Ellie Choker (3), $70 each; liliclaspe.com , a Lili Claspe Isadora body chain, $205; liliclaspe.com , and Stuart Weitzman The Nearlynude sandals, $398; stuartweitzman.com .
4. Margot Robbie
Statement stripes add instant interest, especially to a simple tee and cuffed jeans. Her outfit breakdown : Margot Robbie wore a Brock Collection teal Catch coat, $2,890; modaoperandi.com over a Brock Collection navy Kenza top, $860; modaoperandi.com and Brock Collection dark vintage Wright jeans, $475; modaoperandi.com , with Kate Young for Tura Loni sunglasses, $295, mnzstore.com .
5. Hilary Duff
Limit yourself to two neiboring shades, like cream and beige, for next-level sophistication. Her outfit breakdown: Hilary Duff wore a Rebecca Minkoff Silva dress, $264; neimanmarcus.com with a Raquel Allegra trench robe, $895; fwrd.com for similar color, styling the two with Alexandre Birman Clarita heels, $595; fwrd.com and a Jeffrey Levinson Elina clutch; $1,1500 jeffreylevinson.com .
6. Kendall Jenner
Ensure a pap shot with this model off-duty outfit—a striped coat over a baby tee and distressed jeans. Her outfit breakdown: Kendall Jenner wore a Re/Done | Hanes tee, $78; shopredone.com and Citizens of Humanity Liya High Rise Classic Fit jeans, $258; shopbop.com , complete with an Erika Cavallini Caban Dilip coat, $400; farfetch.com and adidas Originals Stan Smith sneakers, $75; adidas.com .