The jacket is the outer layer that finishes a smart casual outfit. Not a coat — that is a different position for different weather. The jacket sits over a mid layer or a base layer on mild days, adds register to the overall combination, and handles the transitional seasons that make up most of the UK year.
Most men own one jacket bought without much thought. This guide covers the three jackets worth knowing, when each one works, and which to buy first.
Harrington vs bomber vs coach jacket
The smart casual benchmark
The Harrington is the jacket most men should own first. It has been around since the 1930s and its longevity is no accident — the silhouette is clean, the register sits comfortably in the smart casual range, and it works with more outfit combinations than either the bomber or the coach jacket.
Defining features: a stand collar, raglan or set-in sleeves, a zip front, and a tartan lining. Usually made in a cotton or poly-cotton twill. The fit is slightly tailored without being tight — relaxed enough to layer over a mid layer, structured enough to read as a finished outer.
The casual statement
The bomber reads slightly more casual than the Harrington. The ribbed cuffs and hem are the key visual signals — they pull the register toward streetwear rather than smart casual. A clean, minimal bomber in olive or navy can sit within smart casual territory, but the margin for error is smaller than with the Harrington.
The bomber works best: over a plain tee with dark slim jeans and trainers. It works less well: with chinos and a shirt, where it reads as a register mismatch.
The contemporary casual
The coach jacket — also called a windbreaker or track jacket — is the most casual of the three. A lightweight nylon or polyester outer with a simple zip front and minimal structure. It works for active casual contexts and weekend wear, but rarely for anything that needs to read considered.
Buy the coach jacket third, if at all, once the Harrington and bomber are in place and you have identified a specific context the others do not cover.
When each works
The Harrington covers: smart casual occasions across spring and autumn, casual Fridays, weekends with a step up from pure casual, outdoor events where you need an outer that reads considered.
The bomber covers: casual weekend contexts, evenings out in summer where a coat would be too much, any context where the Harrington would feel slightly overdressed.
The coach jacket covers: active weekend contexts, travel, outdoor events where practicality matters more than register.
Fabrics for UK weather
The UK climate requires a jacket that handles light rain without being a full waterproof. The correct fabrics for a smart casual jacket in the UK are cotton twill (the Harrington standard), waxed cotton (slightly more casual, excellent weather resistance), and nylon or ripstop for the coach jacket end.
Avoid: unlined linen jackets in autumn (too thin), heavy wool jackets (that is coat territory), and anything described as "shower resistant" that clearly is not.
Fits
The jacket should fit across the shoulders precisely — this is non-negotiable. The shoulder seam sits on the shoulder, not drooping off it. The body length should sit at the top of the hip, not significantly longer. Sleeves should reach the wrist with a small amount of shirt or knitwear visible at the cuff when the arms are down.
Sizing up for layering: if you regularly wear a mid layer underneath, buy the jacket one size up from your usual. A jacket that fits perfectly over a T-shirt will be too tight over a knitwear layer.
Best picks by budget
The starting point
ASOS, Farah, and Merc London all produce Harrington jackets at this price point. The Farah Harrington in particular is consistently well-reviewed for fit and fabric quality at under £80. Stick to olive, navy, or stone for maximum versatility.
The considered version
Baracuta G9 is the original Harrington and sits at the top of this range. The quality of the Harrington at this price is significantly better than the budget versions — the fabric is heavier, the tartan lining is proper cotton, and the construction holds up over years rather than seasons.
The investment piece
Wax London, Drake's, and Corridor produce jackets in this range that use better fabrics and construction. At this price point you are buying something that will last a decade and improve in appearance over time. Worth spending here once you have established that you wear the jacket regularly.
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