Fabric · 3 min read · January 2026
180 GSM, bio-washed twice: what that actually means
GSM, combed cotton, bio-wash — the three specs on our label, translated into how the tee feels.
GSM is grams per square metre — the weight of the fabric. At 180 GSM, our cotton is substantial enough to hold a boxy shape and stay opaque, but still light enough for an Indian summer.
Combed cotton means the short fibres are removed before spinning, so the surface is smoother and pills far less over time. It is why the tee still looks new after a monsoon of washing.
Bio-washing uses enzymes instead of harsh chemicals to soften the fabric and relax the drape before the garment ever reaches you. We do it twice. That is why the first wear feels like the tenth.
One thing to expect: a variation of up to half an inch in measurements is normal for apparel. It is not a defect, it is how fabric behaves.