Therm-a-Rest Boost 650 20 Sleeping Bag Snug As A Bug In A Rug Experience versatile warmth with the Boost 650 20 Sleeping Bag. Its innovative design allows you to adjust the shape from a roomy semi-rectangular to a heat-efficient mummy bag using the Warm Zip(TM) center zipper, adding up to 10degF of warmth. Ideal for backpacking and camping, this bag ensures a comfortable night's sleep in various conditions. Features Center zipper allows adjustments for customizable warmth and space Hydrophobic down provides lightweight insulation and retains warmth even in damp conditions Multi-use armholes for easy access and ventilation without leaving the bag Eco-friendly materials, made with 100% recycled nylon shell and liner MFG#: 14197SPECIFICATIONSIntended Use Camping, Backpacking Season3-season Temperature Limit20degF / -6deg CInsulation650-fill duck down Material Recycled nylon ripstop with water-resistant treatment Sizes Short, Regular, Long SIZINGSize Short Regular Long Weight35. 3 oz / 1000 g37. 4 oz / 1060 g39. 7 oz / 1125 g Length78. 7"84. 6"90. 6"Girth (shoulder, hip, foot)59", 50", 40"63", 52. 8", 42. 5"66", 54", 44"Packed Size12. 5" x 7. 0"13. 8" x 7. 9"14. 2" x 8. 3"Max User Height5' 6"6'6' 6" | Therm-A-Rest | Boost 650 20 Sleeping Bag | Nylon