Ever wondered why one t-shirt feels premium and structured while another feels thin and see-through? The answer usually comes down to one number: GSM (Grams per Square Metre). It’s the single most important spec to check before buying an oversized tee — and most people never even look at it.
What Exactly is GSM?
GSM measures how much a square metre of fabric weighs. The higher the GSM, the denser and heavier the fabric. Lower GSM fabric is lighter, thinner, and more breathable, while higher GSM fabric is thicker, more durable, and holds its shape better.
180 GSM: The Lightweight Everyday Option
180 GSM cotton is soft, breathable, and ideal for hot and humid weather. It drapes more loosely, which works well for a relaxed, flowy oversized silhouette. The trade-off: it can feel slightly less substantial and may show more wear over time.
- Best for: summer, daily wear, hot climates
- Feel: light, airy, flowy drape
- Durability: good, but needs gentler washing
240 GSM: The Premium, Structured Option
240 GSM fabric is thicker and heavier, giving the t-shirt a boxy, structured drop-shoulder silhouette that oversized fashion is known for. It feels more premium, resists shrinking better, and is far more opaque — no more worrying about see-through fabric.
- Best for: streetwear looks, all-season wear, structured fits
- Feel: thick, substantial, boxy drape
- Durability: excellent, holds shape wash after wash
Which One Should You Choose?
If you live somewhere hot and want an airy, everyday tee, 180 GSM is a comfortable choice. But if you want that premium streetwear look with a fabric that drapes structurally and lasts longer, 240 GSM is worth the small extra investment. Many Driftloom customers actually keep both — 180 GSM for summer errands and 240 GSM for a sharper, elevated look.
Driftloom’s Recommendation
Driftloom’s oversized tees are crafted with a focus on structured drape and durability, so the fit looks exactly as intended in the product photos — even after multiple washes. Check the GSM listed on each product page before you buy, so you know exactly what you’re getting.
