Fabric weight is usually written as GSM — grams per square metre — and it is the most quoted and least understood number in apparel. This is a short, general explainer, not a claim about any one Saint Doggé piece; the fabric of each piece is described on its own product page.
What the number actually measures
GSM is how much a square metre of the flat, finished cloth weighs. A higher number means more material per square metre, which usually means a thicker, warmer, slower-drying fabric that holds its shape. A lower number is lighter and drapes more.
What it does not tell you
Two fabrics of the same weight can feel completely different. Yarn, knit structure and finishing change how a garment hangs, how soft it is and how it wears. A heavy fabric knitted loosely can be less substantial than a lighter one knitted tight, so treat the number as one clue rather than a verdict.
Weight is a clue about a garment, not a verdict on it.
How to use it when you shop
Compare within a garment type: a tee against a tee, a hoodie against a hoodie. Pair the number with the description, the photographs and the size guide, and if you are still unsure, ask — the inbox is answered by a person.