Northstar Tactical Coretech Mummy, Multi Layer Core Sleeping Bag, with Camping Compression Stuff Storage Bag CORETECH DESIGN - Engineered comfort maximized with additional layer of insulation above chest area to protect the bodys thermal core. 0F (-17C) SURVIVAL RATING: Survival of average adult woman. 15F (-9C) COMFORT LIMIT RATING: Average man can sleep comfortably. 30F (-1C) COMFORT RATING: Average standard woman can sleep comfortably. FULLY SYNTHETIC FILL - Hydrophobic silicone air core fill material selected for high compression to maximum loft characteristics. More loft equates to a greater thermal barrier. JUMBO ZIPPER - Full length, two-way, self-repairing #10 zipper allows for easy opening from either end with extra-long high visibility reflective pull tag. OVERSIZED MUMMY - Fits the tall and the small, the hefty and the hungry with an overall size of 86 X 36 X 24 and a large boxed foot area. 5.5 lb trail weight.