Guide to raincoats: 5 rules from Kate Middleton's favorite stylist

A stylish waterproof trench coat is a must-have in any autumn wardrobe. To make sure it not only protects you from the rain but also complements your look, it's important to follow certain guidelines. Here's how to choose an elegant yet practical raincoat that can withstand all the moods of autumn weather.
Pay attention to the length
Jade Holland Cooper, a renowned British designer and founder of the fashion brand Holland Cooper, whose outfits are often seen on Kate Middleton, says the first thing to consider is proportions.
According to her, a trench coat that falls mid-thigh or to the knees is the sweet spot, providing a balance between coverage and freedom of movement.
"[It's] long enough to protect most of your body from wind-driven rain, but not so long that it drags or restricts movement, and I personally love the option to belt, it looks much more flattering," the designer explains.
Fitted silhouette and belt: More than just aesthetics
Trench coats with belts are "the most timeless" style, which, according to stylists, is "eternally chic and flattering."
It's also worth paying attention to small functional details: a removable hood or hidden drawstrings not only add subtle practicality but can create a "cool girl" vibe.
"The classic trench coat is timeless, elegant, good protection, especially with tightening cuffs and a belted waist," Holland Cooper told The Independent.
She adds that a well-made macintosh is "perfect for lighter showers, but when built well can handle heavier rain."
A technical waterproof parka with sealed seams is an excellent choice if you expect heavy rain or spend a lot of time outdoors.
"A collar that can be turned up helps to protect your neck from the rain and also looks smart. Hem styles that aren't too flared also keeps the look more structured," she adds.
Color matters
Fashion experts recommend that a good trench coat shouldn't be a statement piece in your wardrobe, but rather a versatile base. It should be neutral, timeless, and easy to pair.
Holland Cooper suggests choosing a refined color palette. If you prefer dark shades, opt for navy, graphite, or dark green instead of black, as these colors hide splashes and dirt.
Camel, rust (or light brown), and stone tones are classic choices that "go with everything while still looking elevated."
Olive or khaki, when tailored properly and made from the right fabric, can also appear elegant and refined rather than rough or "outdoorsy."
Regarding design, the designer emphasizes: the fewer the hardware details, the lighter the coat looks, without weighing down the silhouette.
Material makes all the difference
The choice of fabric determines everything. You don't have to limit yourself to one type of water-repellent fabric that looks overly technical.
"Each fabric brings a different character. Waxed cotton is the heritage choice, and we're seeing so much of it at the moment with the classic barn coat style. They’re beautifully matte, they soften with age, and they can add a stylish touch while keeping you dry," the stylist says.
Modern recycled synthetics and coated (blended) cotton are lightweight, sharp, and perfect for a more urban, edgy look.
Gore-Tex and other technical membranes offer high performance and, when tailored elegantly, can look just as stylish as traditional fabrics while remaining fully waterproof.
You just need to choose the finish—matte or subtle gloss—that suits your wardrobe.
One trench coat, two looks
A single-breasted macintosh with clean lines is a timeless option. You can easily throw it over a suit or casual clothing.
The key is to avoid overtly sporty details. Look for hidden closures, minimal branding, and elegant proportions so the coat can smoothly transition between different occasions.
"For in the office or a smart occasion, I would definitely go for a waterproof trench coat. They are full-length, keeping you dry, and the tailored lines feel chic while still being practical," Holland Cooper concludes.
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