TL;DR
- A longsleeve is a t-shirt with long arms, usually 150 to 200gsm. A heavyweight sweater is 440gsm with a ribbed collar, cuffs and hem.
- That is more than twice the fabric, which makes them different garments rather than two versions of the same one.
- Structure under a coat is the difference that matters most. A thin longsleeve flattens the moment a coat goes over it. A 440gsm sweater keeps its own volume.
- A Dutch winter is wet and grey more often than it is properly cold. Thin cotton soaks fast and goes clammy; heavy cotton takes far longer to wet through.
- A sweater should not be boxy. It sits in the middle of the system, so an oversized cut bunches at the shoulder as soon as the coat goes on.
- Wash at 30 degrees inside out and dry it flat. Wet, 440gsm is heavy enough to pull the shoulders out of shape on a hanger, and they do not come back.
In this article
- What a longsleeve actually is
- Five differences that actually matter
- Why a sweater should not be boxy
- Where the sweater sits in the winter system
- Four sweaters, four different jobs
- How to keep a 440gsm sweater alive
- Frequently asked questions
A longsleeve is a t-shirt with long arms, usually 150 to 200gsm. A heavyweight sweater is 440gsm with a ribbed collar, cuffs and hem. That is not a small upgrade, it is a different garment: it traps more air, keeps its shape under a coat, and does not go clammy when the day turns wet. In a Dutch winter that difference decides whether you are comfortable.
Every winter the same shortcut. It is getting cold, so you buy longsleeves, because a longsleeve is a jumper you already understand.
It is not. It is the same shirt you wear in July with the sleeves extended, and in December it does almost nothing.
What a longsleeve actually is
Look at the number. Most longsleeves sit between 150 and 200 grams per square metre, which is standard t-shirt weight. The construction is identical to a tee: single layer jersey, thin hems, a collar that is a strip of the same fabric folded over.
Nothing about that garment was designed to be a winter layer. It was designed to be a summer garment with more coverage, which is a completely different problem.
Our sweaters are 440gsm. That is more than twice the fabric, and the difference shows up in five specific places.
Five differences that actually matter
1. Trapped air. Warmth in clothing does not come from the fibre, it comes from air held between the fibres. More fabric per square metre holds a thicker layer of it. This is also why stacking two longsleeves fails: the outer one compresses the inner one and squeezes out the air you were relying on.
2. Structure under a coat. A thin longsleeve flattens the moment you put a coat over it. A 440gsm sweater holds its own volume, so the layer keeps working instead of becoming a vest.
3. The collar. A longsleeve collar is folded jersey and it loses shape within a season. A ribbed collar is knitted to spring back. That matters more in winter than anywhere else, because it is the one part of your mid layer that is visible above a coat all day.
4. Damp. A Dutch winter is wet and grey more often than it is properly cold. Thin cotton soaks fast and goes clammy against the skin. Heavy cotton takes longer to wet through and keeps its structure while it does. You can check what an average winter week here actually looks like in the KNMI normals, and it is rarely the cold that gets you.
5. Lifespan. A longsleeve worn three times a week through a winter is finished by March: thin at the elbows, stretched at the neck. A heavy sweater treated properly lasts years. The cost per wear is not close.
Why a sweater should not be boxy
Our zip hoodies are cut oversized on purpose, because they go over everything. A sweater is the opposite case and needs the opposite cut.
Ours are regular fit. A sweater sits in the middle of the system: over a tee, under a coat. If it is cut oversized it bunches at the shoulder the moment a coat goes over it, and you feel it all day. If it is cut tight it compresses the tee underneath and you lose the air that layer was holding.
Regular fit is the boring answer and it is the right one.
Where the sweater sits in the winter system
Three layers cover a Dutch winter, and the sweater is the middle one.
- Base: a 250gsm tee. Not a longsleeve, not thermal underwear. A heavyweight tee holds its shape under the sweater and still works alone once you are indoors and the sweater comes off.
- Mid: the 440gsm sweater. The layer doing the actual work, five days a week from November to March.
- Outer: a coat, or a zip hoodie down to about two degrees.
The full system, including what to buy first, is in the winter wardrobe piece. For the months before that, the zip hoodie does the outer-layer job instead.
Four sweaters, four different jobs
Same weight, same ribbed collar, same regular fit. What changes is what is on them.
Signature in Jet Black. Nothing on it. This is the one that goes under a coat five days a week and never asks anything of you. If you are buying one sweater, buy this one.
Signature in Navy. The same garment in the safest colour in menswear. Navy is what people buy when black feels like too much and grey feels like nothing.
Signature in Green. The one that bridges autumn and winter, and the colour that survives longest in stock because fewer people reach for it first.
Sinner & Saint in Off-White. Oscar Wilde’s line about every saint having a past and every sinner having a future, across the back. Same weight, different job: this is what you wear when you are not going to work.
The Wave. The only piece we make with chenille embroidery, the raised velvet stitch from varsity jackets, built up in layers of yarn instead of printed onto the fabric. In a season of flat grey surfaces, texture does more than colour. It also costs more to make, which is the honest reason it is priced where it is.
The rest is in the shop, and what is reduced sits on the sale page. If you are buying this as a gift rather than for yourself, the christmas gift guide has the sizing advice.
How to keep a 440gsm sweater alive
This is where most heavy knitwear dies, and it is entirely avoidable.
- Wash at 30 degrees, inside out. Hotter shrinks the fibres and fades the print. The print never touches the drum this way.
- Never tumble dry. Heat and tumbling break the fibres down together. It comes out slightly smaller and permanently rougher, every time.
- Dry it flat, not on a hanger. Wet, the weight will pull the shoulders out of shape and they do not come back.
- Wash it less. Knitwear does not need washing after every wear. Air it overnight and it is good for another two or three.
- Never iron directly on chenille or a print. Iron around it on medium. On The Wave in particular, an iron flattens the embroidery and that is permanent.
Frequently asked questions
What is the difference between a sweater and a longsleeve?
Weight and construction. A longsleeve is a t-shirt with long arms, usually 150 to 200gsm, with a folded jersey collar. A heavyweight sweater is 440gsm with a ribbed collar, cuffs and hem, and it is built to sit under a coat.
Is a heavyweight sweater warmer than two longsleeves?
Usually yes. Warmth comes from trapped air, and the outer longsleeve compresses the inner one, squeezing out the air that was doing the work.
What should I wear under a sweater in winter?
A heavyweight tee at around 250gsm. It holds its shape under the sweater and still works on its own indoors, which a longsleeve under a sweater does not.
Should a sweater be oversized?
No. Regular fit is correct for a mid layer. Oversized bunches at the shoulder as soon as a coat goes over it, and tight compresses the layer underneath.
How many sweaters do I need for a winter?
Two. One plain that goes under a coat on working days, one with something on it for the rest. A third only once the first two are in the wash more than they are on you.
Can a 440gsm sweater go in the tumble dryer?
No. Wash at 30 degrees inside out and dry it flat. The dryer shrinks it slightly and roughens the surface permanently.
