Cold weather sleeping bag question

[pedxing]

I'm not sure but WM doesn't make the Iroquois anymore but it in their line of lite bags so perhaps the Highlite is the replacement.
Jay

The Caribou is the replacement for the Iroquois. I love mine. The Highlite is lighter, but has a 1/2 length zip. The 20oz Caribou has a full length zip and a little more room.

http://www.westernmountaineering.com/ba_Caribou.htm

I'll be in the market for a Winter Bag soon. I may just get another MH Big Bang (the expansion possibility gives temp flexibility /o allowing a draft or uneven insulation).