DCHP-1 Online
Siwash sock Northwest 
a warm ankle-length sock, or liner, of duffle worn inside moccasins, mukluks, etc. and usually folded down at the top.
See also: duffle sock (def. 1)
- 1900 Their Siwash socks were similarly conditioned, and when these had been thawed and removed, the dead-white tips of the toes . . . told their simple tale of the trail.
- 1912 The siwash socks and heavy woolen stockings were sheaths of ice.
- 1900 Their Siwash socks were similarly conditioned, and when these had been thawed and removed, the dead-white tips of the toes . . . told their simple tale of the trail.