Why GSM is the number that matters
Grams per square metre tells you how much cotton is actually in the cloth. Around 140 to 160 GSM is what most budget tees use, and it is why they go translucent at the shoulders and lose their neck shape inside a season. The BLOC tees sit meaningfully heavier, which costs us more per piece and buys you a garment that holds its shape through repeated washing, drapes properly on an oversized cut, and does not show every line underneath. Our fleece pieces are heavier again, brushed on the inside so the hand feel stays soft after the first few washes rather than pilling.