The best are sewn on by hand and reinforced on the inside. Hilary Swank stayed warm in a satin Burberry Prorsum coat in bright turquoise; contrasting buttons added extra flair.
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Ralph Lauren trench, $130; at ralphlauren.com.
Don't bother with it. Simply knot the belt around your waist. Hayden Panettiere looked classic but youthful in a traditional Burberry trench cinched around her middle.
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J. Crew trench, $298; at jcrew.com.
The warmest removable linings will take your trench from spring through the start of winter. For a spring-only coat seek a light lining or a double facing. Or, choose a winter-friendly trench with cold-weather details such as leather trim—like the Operation coat worn by Alicia Keys.
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Thomas Burberry trench, $804; at my-wardrobe.com.
Updated versions of the trench may not sport all the details of the original, but the belt is a must-have. Renee Zellweger showed off her tiny waist in a belted patent trench.
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Banana Republic trench, $80; at bananarepublic.com.
Cotton gabardine is the classic. If you're looking for wrinkle resistance, avoid lightweight cottons; blends are often better. Kristen Bell kept her look crisp in a woven trench from Juicy Couture.
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Miss Sixty trench, $179; at bloomingdales.com.
If you opt for them, make sure the coat fits precisely at the shoulders. Gwen Stefani made the scene in a trench with a flawless fit-and edgy frayed seams.
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Robert Rodriguez trench, $248; at shopbop.com.
Make sure it closes easily. If it falls open the coat may be small. No one knows fit like Angelina Jolie, who was perfectly glamorous in a Loro Piana trenchcoat.
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Gallery trench, $128; at nordstrom.com.