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GSM — grams per square meter — is the single most useful number in garment construction. It tells you how dense the fabric is, how well it will hold a silhouette, and roughly how long it will last under regular wear and washing. And yet most brands either don’t publish it or bury it in fine print.

Here’s the honest breakdown of what GSM means for a heavyweight tee — and where the real threshold is.

The GSM Spectrum Explained

130–160 GSM — Lightweight: Summer basics, layering pieces, athletic wear. You can see through these at arm’s length. Not what you want as a statement piece.

160–200 GSM — Standard: What most mass-market brands build at. Acceptable quality, minimal structure. Fine for everyday basics, not built for a drop-shoulder silhouette.

200–220 GSM — Mid-weight: The zone where many “premium” brands quietly operate. Better than standard, but still insufficient for true structure on oversized cuts.

220–260 GSM — Heavyweight entry: This is where you start to get real structure. A 240 GSM tee holds a drop shoulder. It doesn’t pill after five washes. It can be the main piece in an outfit, not just a layer.

260–320 GSM — True heavyweight: Premium territory. The fabric has presence. It hangs properly, drapes intentionally, and holds up across seasons. This is where FNDMNTLS™ operates for our core collection.

320+ GSM — Winter-weight: Hoodie and fleece territory. For tees, this is extreme — but some limited-run capsule pieces work here intentionally.

Why 240 GSM Is the Real Floor for Streetwear

The drop-shoulder silhouette — the defining cut of heavyweight streetwear — requires fabric weight to function. Below 220 GSM, the shoulder seam drifts, the sleeve hangs awkwardly, and the overall silhouette reads “lossy” instead of intentional.

At 240 GSM, the geometry works. The shoulder sits where it’s supposed to. The chest has presence. The hem drops cleanly.

This is not an aesthetic preference. It’s a construction reality.

What FNDMNTLS™ Builds At

Our core tees run 240–280 GSM in ring-spun cotton. We publish the exact GSM and fabric composition on every product page. If a product says 260 GSM, it’s 260 GSM — not a range, not an approximation.

The AKIRA Capsule tees are built at the upper end of this range specifically to support the graphic weight and silhouette structure the drop requires.

The Takeaway

If you’re shopping for a heavyweight tee:

• 240 GSM is your minimum for a proper oversized silhouette
• 260–280 GSM is the sweet spot for year-round wear
• If the brand won’t publish the GSM, that tells you something
• Ring-spun or combed ring-spun cotton is the construction standard at this weight

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