Heavyweight fabric guide.
When people ask what makes a heavyweight hoodie feel heavyweight, the answer usually comes down to a single number: GSM. Understanding it is the fastest way to shop for structure, drape, and longevity — not just for a logo on a rack.
What is GSM?
GSM stands for grams per square metre. It is the standard measure of fabric weight and density, recording how much a one-square-metre piece of the fabric weighs. Higher GSM means a denser, more substantial knit; lower GSM means a lighter, more breathable one.
What GSM is a heavyweight hoodie?
There is no official cut-off, but most of the industry agrees on the following ranges for cotton fleece:
- 200–280 GSM — Lightweight. Layerable, drapes softly, common in fast fashion.
- 280–380 GSM — Midweight. The standard supply-chain hoodie weight.
- 380–450 GSM — Heavyweight. Holds its shape, structured shoulders, warmer.
- 450+ GSM — Ultra-heavyweight. Boxy, sculptural, prized in premium streetwear.
Why heavyweight fabric matters for hoodies
Heavyweight fleece does three things a midweight cannot. It holds its silhouette after repeated wear and wash — the shoulders don't collapse, the hem doesn't curl. It ages predictably; the loops on the interior compact rather than pill. And it drapes with weight, so an oversized cut reads considered rather than baggy.
The trade-off is warmth and dry time. Heavyweight hoodies run hot in summer and need patience on the drying rack. That is the point — they are built as a core layer, not a throwaway.
How tripplem's weights compare
Every tripplem hoodie is knit at 460 GSM from long-staple loopback cotton, then garment-dyed for depth of colour. That places our fleece at the upper end of the heavyweight range — heavier than most streetwear labels, in line with premium Japanese and Los Angeles studios.
Our t-shirts sit at 240 GSM combed cotton with a tubular body. Not heavyweight by t-shirt conventions — we prefer a tee that layers cleanly under a heavyweight hoodie over one that fights it for volume.
Reading a spec before you buy
If a hoodie's product page does not list a GSM, treat it as midweight until proven otherwise. Reputable heavyweight makers publish the number. It is the fastest sanity check against marketing copy.