A -60 degree bag. I believe the Antarctic model is the only -60 degree bag made in the world. The loft averages 10 inches, and the weight for a regular length, wide body model is 6.5 pounds. The long wide body weighs 7 pounds. Adding the Flexible Temperature Range Sleep System (FTRSS) brings the temperature range down to -80.

Sizes Available:
Regular/Wide Body (80" x 34")
X-Long/Wide Body (90" x 34")