Short answer: a gilet sits flat under a coat when it is thin: a lightweight quilted gilet, an ultralight down gilet or a knitted gilet. Thick padded gilets are the ones that bulge at the chest, because the coat presses the padding outwards at the fastening. Wear those as the outer layer instead. At WARDLEY the flattest options are the Hyde Lightweight Quilted Gilet (£59), the Dulwich Ultralight Packable Down Gilet (£99) and the Lyme Knitted Zip Gilet (£79).
To be clear about who is writing: these are our own gilets. This is a guide to choosing one for layering, not an independent review. Prices are from our product pages on 12 November 2026.
Why some gilets bulge under a coat
A coat is cut with room for a jumper, not for a second padded jacket. When the gilet's filling is thick, the coat pushes it forward where the two fronts meet, and you get a ridge across the chest. Three things decide whether that happens:
- Thickness of the fill. Ultralight down and thin quilting compress almost flat. Heavy padding does not.
- The neckline. A V-neck or low stand collar hides under a coat's lapels. A tall, padded collar fights them.
- The fit. A gilet worn under a coat should be close to the body. Extra room bunches up once the coat is buttoned.
WARDLEY gilets that sit flat under a coat
| Gilet | Type | Price | Why it works under a coat |
|---|---|---|---|
| Hyde Lightweight Quilted Gilet | Lightweight quilted | £59 | Thin quilting and a stand collar; made to layer over knitwear or under a coat |
| Dulwich Ultralight Packable Down Gilet | Ultralight down | £99 | Packable down compresses flat under a coat's front |
| Mortlake Ultralight Down Gilet | Ultralight down | £99 | Light fill that gives warmth without depth |
| Mayfield V-Neck Down Gilet | V-neck down | £99 | The V-neck sits under the lapels, so nothing shows at the collar |
| Lyme Knitted Zip Gilet | Knitted | £79 | No padding at all; a knit layer for over a shirt and under a coat |
Better as the outer layer: padded styles such as the Chelsea Water-Repellent Padded Gilet and the reversible Epping Fleece Gilet. Wear them over a jumper on dry, cold days rather than under a tailored coat.
How to test it at home
- Put on the jumper or shirt you will actually wear, then the gilet, zipped.
- Put your coat on and fasten it fully.
- Look side-on in a mirror. The coat's front should lie in one line from collar to waist.
- Sit down and reach forward. If the gilet pushes the coat open or rides up at the neck, it is too thick or too big for that coat.
If you are between sizes and the gilet is mainly for wearing under a coat, the closer fit is usually the better one. Check the garment measurements on each product page against a gilet you already own.
Questions
Should a gilet be worn under or over a coat?
Under, if it is thin and the coat is the smart layer. Over a jumper, without a coat, if it is padded. A padded gilet is outerwear in its own right.
Does a down gilet keep you warm under an overcoat?
Yes. Down gives a lot of warmth for very little thickness, which is why an ultralight down gilet is the usual choice for adding core warmth under an overcoat.
What should I wear under the gilet?
A fine jumper, an Oxford shirt or a roll neck. Avoid chunky knits when the gilet is going under a coat as well, or the layers will crowd the coat's armholes.
How long does delivery take?
Free tracked UK delivery: dispatched in 1–2 working days, usually delivered in 3–5 working days, with 30-day returns on unworn items.
See every style in WARDLEY men's gilets, and the coats to wear over them in men's overcoats. New to gilets? Start with what is a gilet.
