GSM (Grams per Square Meter) is the standard measurement of fabric weight — the mass of one square meter of fabric in grams. Higher GSM = heavier, denser, more opaque fabric. Lower GSM = lighter, more breathable fabric.
| GSM Range | Typical Use | Fabric Examples | SP3LOPS SKU |
|---|---|---|---|
| 80–140 GSM | Ultra-lightweight tops, linings, base layers | Polyester interlock, single jersey | FB-006 (140 GSM) |
| 140–180 GSM | Lightweight activewear tops, yoga tops | Jacquard knit, eyelet mesh | FB-004 (145 GSM) |
| 180–250 GSM | Yoga pants, leggings, sports bras | Nylon spandex interlock, athletic knit | FB-007 (185 GSM) |
| 250–350 GSM | Compression wear, winter leggings, mid-layers | Compression interlock, brushed interlock | FB-009 (240 GSM) |
| 350–500 GSM | Hoodies, fleece, softshell jackets | Polar fleece, softshell | FB-001 (430 GSM) |
Opacity (Squat-Proof): For yoga and activewear, fabric below 150 GSM risks being see-through during stretching. At 180-250 GSM with the right spandex content, you achieve the squat-proof guarantee that consumers demand.
Drape & Hand Feel: Lower GSM fabrics drape more fluidly. Higher GSM fabrics hold structure. A 430 GSM softshell will feel substantial and protective. A 145 GSM jacquard will feel ethereal and second-skin.
Durability: Higher GSM generally means better abrasion resistance and longer product life. For equestrian riding tights, 280-320 GSM is recommended due to saddle friction.
Seasonality: 120-180 GSM for summer. 200-280 GSM for year-round. 300+ GSM for winter. Smart brands source across the GSM spectrum to build seasonal collections.
Under the EU ESPR regulation (effective July 2026), fabric weight directly impacts your compliance strategy. Heavier fabrics require more raw material and generate more waste if overproduced. Our 50m MOQ model lets you source the exact GSM you need — no overcommitment, no deadstock.