On 480 GSM.
Weight is the most honest thing about a sweatshirt. Here is what the number means, and why we chose a high one.
GSM means grams per square meter — the weight of the cloth before it is cut into anything. It is the single number that tells you the most about a garment and the one most often left off the label. A typical mass-market sweatshirt runs 250 to 320 GSM. The Tolerance Crewneck is 480.
That difference is not bravado. Heavier loopback cotton holds its shape under the two forces that ruin a sweatshirt: gravity and the wash. A light fabric drapes beautifully on the rack and surrenders within a season — the body grows, the collar slumps, the hem waves. A heavy one keeps the line it was cut to. You pay for it in grams and earn it back in years.
Weight is the most honest thing about a sweatshirt.
Why not heavier still
Because tolerance runs both ways. Past a certain weight a crewneck stops being a garment and becomes upholstery — stiff, slow to dry, unpleasant against the arm. 480 is the figure where the cloth is substantial enough to behave and supple enough to wear daily. We did not pick it to win a number contest. We picked it because it is the point the spec asked for.
The ribbing is its own decision. A collar is knit to a different tension than the body precisely so it can resist the stretch the body cannot. Get that wrong and the heaviest cloth in the world will still give you a gaping neck. Weight buys you a durable panel; construction is what keeps the panel in the shape of a garment.
So when you read 480 GSM on the spec sheet, read it as a promise about time. It is the cloth choosing to be here in five years, which is the only kind of luxury we are interested in.