Uniqlo has $20 off all their Ultra Light Down stuff until 1st May.
I haven't tried them myself (I'll be getting one this deal), but I hear they're pretty decent winter wear. Plus it's portable, packing down into a small bag.
MEN:
Vests: $59.90 (reduced from $79.90)
Jackets: $99.90 (reduced from $119.90)
Parkas: $99.90 (reduced from $119.90)
Coat: $129.90 (reduced from $149.90)
WOMEN:
Vests: $59.90 (reduced from $79.90)
Jackets: Compact: $59.90 (reduced from $79.90), Standard: $89.90 (reduced from $109.90)
Parkas: $89.90 (reduced from $109.90)
Coats: $149.90 (reduced from $169.90)
I'd link to specifics, but there's quite a few different styles to choose from.
https://www.ozbargain.com.au/node/243217