A peacoat is a short, double-breasted wool coat with naval roots, sitting at the hip. A trench coat is a longer, belted, water-resistant coat from WWI, reaching the knee. An overcoat is the longest and most formal, falling below the knee in heavy wool. A duffle coat is a hooded, toggle-fastened wool coat with a roomy, relaxed silhouette.
The Peacoat: A Navy Classic Cut Short
The peacoat traces its roots to the Dutch navy in the early 1800s. The word itself is believed to derive from the Dutch term pije, which referred to a coat made from coarse, heavy wool designed to withstand biting sea winds. The British Royal Navy refined the design, crafting it from dense, tightly woven melton wool, and by 1897 it was formally codified in U.S. Naval uniform regulations.
What defines a peacoat today:
- Length: Hip to upper thigh — roughly 26 to 30 inches from collar to hem, designed so it would not become tangled in a ship's rigging
- Closure: Double-breasted with two rows of buttons; the wide, upturned collar can be raised against wind
- Fabric: Traditionally melton wool, thick enough to block wind and repel moisture yet structured enough to hold a crisp silhouette
- Fit: Close but not tight — room for a heavy knit underneath, but never oversized
- Best for: Casual to smart-casual occasions, city commuting, colder weather where you need warmth without a long hem
The Trench Coat: A Wartime Invention That Never Left
The trench coat's story begins in the late 19th century, when Thomas Burberry invented gabardine in 1879 — a tightly woven cotton that was breathable, lightweight, and water-resistant without being rubberized. When World War I began in 1914, privately purchased trench coats became common among officers on the Western Front; their knee-length cut kept mud from soaking trousers while allowing freedom of movement, and the name came directly from their widespread use in those front-line positions.
Signature features of a trench coat:
- Length: Knee-length minimum — long enough to protect but not trail in mud
- Closure: Double-breasted, with a belted waist and storm flap across the chest
- Fabric: Cotton gabardine, water-resistant rather than fully waterproof — suitable for showers and city commuting but not sustained heavy rain
- Details: Shoulder epaulettes, D-rings, raglan sleeves, and belted cuffs — all originally functional military features
- Best for: Spring and autumn transitional weather, smart-casual to office dressing, travel
The Overcoat: Formal, Long and Seriously Warm
"Overcoat" is both a category name and a specific silhouette. As a category, it describes any coat worn over other clothing. As a silhouette, it means a long, tailored, typically single- or double-breasted coat in heavy wool or cashmere, extending below the knee — sometimes reaching the ankle — and designed to be worn over a suit or formal dress. Longer coats provide better insulation and wind protection, making them the warmest of the four styles covered here.
What to expect from an overcoat:
- Length: Below the knee, typically 38 to 44 inches from collar to hem
- Closure: Single- or double-breasted buttons; common styles include the Chesterfield (single-breasted, fly front, often with a velvet collar) and the Polo coat (double-breasted, wide lapels)
- Fabric: Heavy wool or cashmere — wool fibres are naturally crimped, creating tiny air pockets that trap heat and keep the cold out
- Fit: Tailored and structured, with a sleek, polished silhouette
- Best for: Formal occasions, business wear, very cold weather, wearing over suits or tailored clothing
The Duffle Coat: The One With Toggles
The duffle coat takes its name from Duffel, a town in the Belgian province of Antwerp, where a thick, coarse wool cloth was produced and traded from at least the early modern period. The British outerwear maker John Partridge developed the modern version in the 1850s, reportedly inspired by Polish frock coats that featured a capacious hood and toggle fastenings. The British Admiralty then commissioned it by 1890 for the Royal Navy, and brand Gloverall brought it to the civilian market in 1951.
Duffle coat essentials:
- Length: Typically mid-thigh to knee
- Closure: Horn or wooden toggles threaded through leather or rope loops — practical with gloves on, in wet or cold conditions
- Hood: An integral part of the design, roomy enough to fit over a hat
- Fabric: Heavy, coarse wool; the roomy, box-cut silhouette is built for layering underneath
- Best for: Casual, relaxed weekend dressing; practical cold-weather protection; effortlessly laid-back style
Side-by-Side: How the Four Coats Compare
- Peacoat: Short (hip), double-breasted buttons, melton wool, smart-casual, naval origin
- Trench coat: Knee-length, belted, gabardine cotton, water-resistant, military/transitional-season origin
- Overcoat: Below knee to ankle, tailored buttons, heavy wool or cashmere, formal/very cold weather
- Duffle coat: Mid-thigh to knee, toggle-and-loop, thick wool, hooded, casual/cold weather
The single biggest differentiator is length: peacoat shortest, overcoat longest, with trench and duffle in between. After length, the closure tells you the rest — buttons are versatile, a belt signals the trench, and toggles mean duffle, every time.
If you are shopping for a coat that transitions gracefully between casual and dressed-up, ANAHIV's made-to-order jackets, blazers and coats are crafted in wool and available in custom sizes — each piece made after your order is placed, with no overproduction.
Related Questions
What is a peacoat?
A peacoat is a short, double-breasted coat — typically hip length — made from dense wool and featuring a wide lapel that can be turned up against the wind. It originated in the Dutch navy in the early 1800s, was refined by the British Royal Navy using melton wool, and crossed into civilian fashion long before the 20th century. Today it reads as smart-casual and works well from autumn through winter.
Which type of coat is warmest?
Of the four styles, the overcoat is generally warmest — its longer length (below the knee, sometimes to the ankle) covers more of the body, and its heavy wool or cashmere fabric traps air effectively for insulation. That said, warmth also depends on fabric weight, lining, fit and the layers worn underneath: a heavy duffle coat with a hood can outperform a lightweight overcoat in bitter wind.
Which coat should you buy first?
For most wardrobes, a peacoat or a trench coat is the most practical first investment. A peacoat in a neutral — navy or camel — covers smart-casual and casual occasions through autumn and winter. A trench coat earns its keep across three seasons and works over everything from jeans to tailoring. Buy the overcoat once you need to dress formally in the cold; add a duffle when you want something relaxed and character-filled.
Can women wear all four coat styles?
Absolutely — all four have strong traditions in women's fashion. The peacoat gained ground in women's wardrobes in the early twentieth century. The trench became a wardrobe staple for women through the second half of the 20th century. Overcoats and duffle coats both translate beautifully to women's silhouettes, especially when tailored or belted to define the waist.
Whichever style you are drawn to, wool is the thread that connects them all — and a coat made to your exact measurements, cut after your order is placed, is one worth keeping for years. Explore ANAHIV's made-to-order wool coats, blazers and jackets for autumn and winter. And if you are thinking about how to layer lighter pieces beneath your outerwear, our guide on how to wear linen in winter has practical ideas that work under any of these four styles.