The Crescent Lake series sleeping bags are made with Techloft+ insulation. Techloft+ Insulation consists of multi-hole staple-length micro-denier fibers that have a siliconized finish for maximum insulation, loft, and compactness. The Crescent Lake uses a 2-layer offset construction, sometimes called a "bag within a bag." The contoured hood and mummy shape helps seal up your warmth and keep you warmer. The Crescent Lake is a great backpacking sleeping bag to take along on your hikes that won't take up all the space in your pack. Features: - TechLoft+ - 2 Layer Offset - Insulated Chest Baffle - Zipper Baffle - Contoured Hood - Standard Stuff Sack Included Specifications: - Outer Material: 210T Polyester - Outer Color: Green/Clay - Liner Material: 210T Polyester - Liner Color: Black - Shape: Mummy - Zipper: #8 Separating - Length: Long - Dimensions: 34" x 86" - Fill Weight: 44 oz. - Total Weight: 4 lb. 6 oz.