The warmest leather jacket is a shearling B3, because the wool is part of the hide rather than a lining sewn in afterwards. After that comes a shearling collar aviator jacket, then a quilted lined leather jacket, then an unlined one. The leather itself contributes almost nothing to warmth. What it does is block wind completely, and the lining does the rest.
That distinction matters, because a lot of people buy a leather jacket expecting warmth and get a windproof jacket instead. Here is what actually keeps you warm and what each option realistically handles.
Ranked by Warmth
1. Shearling B3
Sheepskin with the wool left on the inside, tanned as a single piece. There is no air gap between shell and insulation, and wool holds heat while still letting moisture escape.
Handles: genuinely cold conditions, well below freezing, including wind. This was designed for open and unheated aircraft.
Trade off: heavy and bulky. Too warm for anything mild. See Shearling Leather Jackets.
2. Aviator jacket with shearling collar
Heavy hide, wool or shearling lining through the body, and a wide shearling collar that folds up around the throat. Slightly less insulation than a full B3 but far more manageable.
Handles: cold winter days, around and below freezing.
Trade off: still substantial, but easier to live with than a B3. See Aviator Jackets.
3. Quilted lined leather jacket
A standard leather jacket with a quilted or padded lining. This is what most winter ready leather jackets use.
Handles: cool to cold weather with a jumper underneath. Good from autumn through most of a mild winter.
Trade off: not enough on its own in real cold. See Motorcycle Jackets.
4. Leather coat
Longer length means more coverage, and a lined leather coat protects the legs and lower back that a jacket leaves exposed. Length is genuinely worth warmth.
Handles: cold days, especially windy ones, over layers. See Mens Leather Coats and Womens Leather Coats.
5. Unlined or thinly lined leather jacket
Windproof but not insulated. Good in autumn and spring, not a winter jacket.
Why Leather Alone Is Not Warm
Leather is a dense material with no trapped air in it, and trapped air is what insulation actually is. A wool jumper is warm because of the air held between the fibres. Leather has none of that.
What leather does exceptionally well is stop wind. In practice wind chill removes more heat than air temperature does, which is why a lined leather jacket often feels warmer than a much thicker knit. But that is windproofing, not insulation.
So when comparing jackets for winter, look at the lining first and the hide second.
Layering Under Leather
The instinct is to buy a jacket a size up so a thick jumper fits underneath. That is usually the wrong move, because it leaves you with a loose jacket for the rest of the year.
Better approach:
- A fine merino rollneck adds real warmth and almost no bulk. The single most effective layer under leather.
- A leather shirt under the jacket is warmer than it looks and takes up almost no space. See Leather Shirts.
- A thin quilted gilet under a roomy bomber beats a chunky knit for warmth per bit of bulk.
- A shearling vest under a coat adds core warmth without sleeve bulk. See Mens Leather Vests.
- Scarf and gloves. More warmth per bit of bulk than a bigger jacket, every time.
If you need genuine winter warmth, buy a warmer jacket rather than a bigger one.
Sizing Winter Jackets
Shearling and aviator jackets are the exception to the usual rule. Size up by one, because the wool takes up real internal space and you will layer underneath. For everything else, size for what you wear most days.
Our guide on whether to size up or down in a leather jacket gives the rule for every style, and the numbers go against our Size Guide.
Order Before You Need It
Everything at Leather Outlet is made to order, which means there is a production window between ordering and shipping. Shearling pieces are among the more involved jackets we build.
Ordering in October means the jacket arrives before the weather turns. Ordering in December means wearing it in February.
Frequently Asked Questions
What is the warmest leather jacket?
A shearling B3, because the wool is part of the hide with no air gap between shell and insulation. After that, an aviator jacket with a shearling collar and wool lining.
Are leather jackets warm in winter?
Only if lined. Leather itself provides very little insulation, but it blocks wind completely, which is why a lined leather jacket often feels warmer than a thicker knit.
Is a leather jacket warmer than a wool coat?
In wind, usually yes, because leather blocks it completely while wool does not. In still cold air a thick wool coat can be comparable.
What should I wear under a leather jacket in winter?
A fine merino rollneck is the most effective layer, adding warmth with almost no bulk. A leather shirt or a thin quilted gilet also work well.
Should I size up my winter leather jacket?
Only for shearling and aviator styles, by one size. For other jackets, size for what you wear most days and layer smart rather than thick.
Does a longer leather coat keep you warmer?
Yes. Length covers the lower back and thighs that a short jacket leaves exposed, and it makes a real difference in wind.
When should I order a winter leather jacket?
October, or early November at the latest. Made to order jackets have a production window, and shearling pieces take longer to build.
Getting Ready for Winter
Look at the lining before the leather, layer thin rather than thick, and order early enough that it arrives in time. Browse Shearling Leather Jackets, Aviator Jackets and Womens Shearling Jackets, and check the Size Guide before ordering. Made to order in real leather, XS to 5XL, free worldwide shipping.
0 comments