The Womens Argo Supreme Jacket from Jack Wolfskin is a super-Lightweight down Jacket on it's own or under a hardShell. Or stash it In its pack bag and take it with you. We've used a very special type of down for the Argo Supreme. It has exceptionally good loftIng Capabilities, it's super warm and ultra Light–and it is also water resistant, courtesy of the special impregnation treatment. The special fill chamber construction prevents down slippage and migration. And the Hood keeps your head nice and warm.