The Alps Mountaineering Aura 0 Mummy Sleeping Bag sleeping bag series offers lightweight, compactable sleeping with premium thermal efficiency. This Alps Mountaineering sleeping bag features synthetic TechLoft Micro Insulation, consisting of multiple denier staple-length fibers that have a siliconized finish for maximum insulation, loft, and compactness. 2-layer construction and the contoured hooded mummy shape help maximize warmth on chilly nights. This insulated sleeping bag also boasts an insulated chest and zipper baffle to combat heat loss. Comfort and durability come from the high-quality nylon ripstop shell and soft polyester liner. The #8 separating zipper hardware provides durability and smooth operation. A second zipper also offers multiple ventilation options or the ability to easily sit up without leaving the warmth and comfort of your bag, completing the Aura as a great addition to your camping essentials.Manufactuer model #: 4652433. Nylon ripstop shell Soft polyester liner TechLoft Micro Insulation 2-layer construction Contoured mummy hood shape Insulated chest and zipper baffle #8 separating zipper hardware Second zipper for custom ventilation or sitting up while retaining heat