Term
Fabric weight (GSM)
The fabric's weight in grams per square metre, the number closest to how a piece feels: about 150 is light and summery, 280 heavy and structured.
Also called: grams per square metre
How we do it at Tamm
Every garment in the catalog carries its weight on its page. The basic tee is 180, and the heavyweight two-ply pieces pass 275.