Materials
Fabric weight is on the product page because it is the thing that decides how a garment ages. A 240 gsm tee holds its neck; a 180 gsm one does not.
Where a fibre is worth naming — 14 oz rigid cotton, extra-fine merino, 700 fill down — it is named, along with how to wash it so it lasts.
Care
Almost everything here lasts longer washed cold and hung to dry. The exceptions are on the product page, in the fabric and care panel, in plain words rather than symbols.