In the clothing industry, SS and FW are English abbreviations for seasons. SS also writes S/S, which is short for spring/summer. FW is also written as F/W, which is short for Fall/Winter. In addition, because there are two ways to write Autumn in English, namely Fall and autumn, autumn/winter can also be abbreviated as AW or a/w.
Extended information: Abbreviations of other professional terms in clothing industry:
C: cotton, cotton
V: Vinylon or Vinylon, Vinylon?
T: polyester, polyester?
A: Oren, acrylic?
O: polypropylene fiber