With 600 fill goose down and a durable, water repellent shell, the Doze will keep you cozy and warm on your next cold weather overnight. Lightweight and priced to fit your wallet, the Doze features a five-piece ergonomically-designed hood with a face seal to keep you toasty on cold nights, and it comes in multiple SmartFit™ sizes to enable you to pick the perfect bag for you. Sleeping Bag Specs Rating: 20F | -7C Fabric Goose Down Still the warmest and most compressible insulation available GoLite uses premium quality 800- and 600-fill power goose down. Down is still the most thermally efficient insulation available, i.e. it provides more warmth for its weight than any other insulation available. Down is also superior in its drape, comfort, lifespan, and compressibility. Nature is an incredible thing. Unmatched warmth-to-weight ratio: down’s fine filaments reach out into its surroundings and create dead air space that slows the escape of warm air, doing it better than any synthetic. More compressible and durable than synthetic insulations, and it retains its loft better over time. Getting the right fit for your sleeping bag is essential to ensuring a good night’s sleep. A poorly fitted bag is not only uncomfortable, but it can also reduce the warmth rating of the bag selected. GoLite’s SmartFit™ allows you to select the shape and size of your sleeping bag based on your body type and preferences. Each bag is offered in three lengths and two widths (some in narrow and regular, others in regular and wide). SmartFit™ bag shapes were designed to optimize fit dimensions for each size category, baffle by baffle. Features 5-piece ergonomic hood with 360° face-seal gasket 6 in/15 cm baffles with slant box construction 36 in/91 cm two-way #5 coil YKK ground level side seam zipper with interior draft tube Left zipper only Ultra-lite 20°F/-07°C down sleeping bag Draw cord face opening for adjustability Down-proof, 30 denier x 24 filament crossed ripstop nylon shell with DWR Imported