Sleep tight with our versatile 20°F (-6.7°C) Trekker Sleeping Bag. 2.5 lbs. Poly-Therm hollow synthetic insulation retains insulating efficiency if wet. Constructed with a rugged polyester diamond ripstop shell, and comfortable polyester pongee lining. Has a builtin chest pocket, and comes in a compression sack. The perfect 3 season bag.