The Fireside Mummy by Chinook features 350 grams of 90/10 grey duck down, 575+ fill power insulation giving this bag a great weight to temperature ratio. Chinook rates the Fireside Mummy at 2°C (36°F) providing plenty of warmth on those late spring to early fall hikes. The bag has an outer shell made of honeycomb & diamond rip-stop nylon which will provide durability and promote long use. Also for durability and long use, this sleeping bag uses a 2-way #5 YKK zipper. The lining is made from polyester to reduce weight and increase compactibility.Features:- All Chinook sleeping bag receive water-repelling treatments- Zipper Guards keep zippers snag free and have you zipping in and out of your bag with ease- Draft Tubes prevent heat loss through the coils of zippers- VELCRO Tapes secure zip closures, preventing zippers from accidentally coming undone- Utility Pockets provide a safe and secure place for stashing your valuables- Barrel Lock Closure give a full control over drawcords to easily adjust them- Thermal Collar fit snugly around the neck and trap warm air from escaping through the collar Specifications: – Temperature Rating: 2°C / 35°F- Style: Mummy- Length: 83″- Width (at Hips): 30″- Carry Weight: 1.7 lbs.- Shell Material: Honeycomb & Diamond Ripstop Nylon- Insulation: French Pyrenean 90/10 Grey Duck Down, 575+ Fill Power- Fill Weight: 12 oz.