What GSM Is a Heavyweight T-Shirt?
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A heavyweight t-shirt starts at roughly 280 GSM. Below that a tee is midweight. Between 260 and 280 GSM the word begins to be used, and it holds if the knit is sound. Above 300 GSM there is no argument left to have. Our own tees run from 210 to 340 GSM, and the change in behaviour across that span is easy to feel in the hand.
Where the line sits for a t-shirt
No standards body sets these terms. So the useful question is not what the label says but where the fabric changes behaviour. In a single layer of cotton jersey, that happens close to 280 GSM.
- Under 180 GSM. Lightweight. Falls close to the body, dries fast, reads as a base layer.
- 180 to 260 GSM. Midweight. Where most retail tees sit.
- 260 to 280 GSM. The threshold. Dense enough that the term starts to apply.
- 280 to 340 GSM. Heavyweight. Holds a cut shape on its own.
Two pieces from our range show the span. The Premium Heavyweight Tee is 260 GSM combed cotton, sitting at the entry point. The Snow Wash Raw Hem Boxy Tee is 340 GSM pure cotton, well past it.
Why the number is lower than for a hoodie
A heavyweight hoodie begins near 350 GSM. A heavyweight tee begins near 280. That gap is not an inconsistency. It follows from what each garment has to hold up.
A hoodie carries a hood, a pocket and ribbed cuffs, and the shoulder seam has to support all of it. That takes density. A tee has one layer of jersey and a collar. It needs far less weight to keep its line. The threshold is relative to the garment, not fixed across a wardrobe. Our hoodie figures are set out in What Makes a Hoodie Heavyweight.
The same logic explains why a 340 GSM tee and a 340 GSM fleece are not comparable pieces. Identical figure, different construction, different purpose. The measurement itself is explained in What GSM Means in Clothing.
What changes as a tee gets heavier
The collar. Light jersey lets a neckline roll and stretch within a few washes. Denser fabric, and a reinforced collar, keep it flat.
The hem. Light cotton curls at the hem. Heavier cotton hangs straight, which is what lets a boxy cut read as deliberate rather than loose.
Opacity. More grams in the same area means more material between the light and the body. Weight is the main reason a pale tee is opaque or is not.
The shoulder. A dropped shoulder needs enough weight to fall cleanly from the seam. In light jersey that seam puckers and the volume collapses.
Drape. Heavier cotton falls in fewer and larger folds. It moves as one piece instead of following every motion.
Drying time. This is the cost. Cotton holds water, and more cotton holds more of it. A 340 GSM tee takes noticeably longer to dry than a 210 GSM knit.
Four tees, 210 to 340 GSM
Every figure below is stated on the relevant product page.
| Tee | GSM | Composition | Fit |
|---|---|---|---|
| Snow Wash Raw Hem Boxy Tee | 340 | 100% cotton | Boxy, oversized |
| Vintage Wash Raw Edge Tee | 320 | 100% cotton | Cropped, loose, raglan sleeve |
| Premium Heavyweight Tee | 260 | 100% combed cotton | Oversized, dropped shoulder |
| Women's Turtleneck Batwing Tee | 210 | 95% cotton, 5% elastane | Fitted body, batwing sleeve |
340 GSM, snow washed
The Snow Wash Raw Hem Boxy Tee is the heaviest tee we make. At 340 GSM in 100% cotton it holds a boxy silhouette with no help from the wearer, and the raw unfinished hem stays put rather than curling. Garment dyed through a snow wash, so each piece varies. Three washed colourways, S to XL.
320 GSM, vintage washed
The Vintage Wash Raw Edge Tee is 320 GSM pure cotton, vintage washed and finished with a raw edge. Raglan sleeves and a cropped loose line. The wash softens the hand, so it reads less rigid than the figure suggests while keeping the structure the weight provides. Three colourways, S to 2XL.
260 GSM, combed cotton
The Premium Heavyweight Tee is 260 GSM combed cotton with a reinforced collar and a dropped shoulder. This is the most useful weight in the range for year round wear. Heavy enough that the collar and hem hold, light enough to layer under a jacket or a hoodie without bulk. Five colourways, S to 3XL.
210 GSM, cotton and elastane
The Women's Turtleneck Batwing Tee sits deliberately below the heavyweight line. At 210 GSM in a 95% cotton, 5% elastane knit, it is built to follow the body rather than stand away from it. Hooded turtleneck collar, three quarter batwing sleeve, cropped line. A heavier cloth would not drape this way. Four colourways, S to L.
Which weight to choose
- A structured tee worn as the outer layer. 300 GSM and above.
- A boxy or oversized cut. 300 GSM and above, so the volume holds its shape.
- Year round wear and layering. 260 to 280 GSM.
- Warm weather, or a close fit. Under 250 GSM, and a knit with some stretch if the cut follows the body.
- Travel. Lower weight. Heavy cotton is slow to dry and takes up room.
Heavier is not better. It is more specific. A 340 GSM tee is the wrong garment for August, and a 210 GSM knit will not hold a boxy line. The figure tells you the season and the silhouette, which is the point of publishing it.
Reading a weight claim
If a tee is sold as heavyweight with no figure attached, there is nothing in the claim to check. Three pieces of data settle it: the GSM, the fibre percentages, and the knit. A brand holding that data has no reason to withhold it.
Every Gilded Streets product page states the weight and the composition. Pieces at 400 GSM and above are described as heavyweight, and those at 500 GSM and above as ultra heavyweight. Those designations sit at product level, so the figure is on the page rather than in a category name. Our approach to publishing this data is set out on the Materials page, and how the fabrics are finished and washed on Craftsmanship.
In short
Around 280 GSM for a tee, against around 350 GSM for a hoodie. The threshold moves because the garment changes. What stays constant is that a stated number can be checked and an adjective cannot.