Heavyduty winter mummy sleeping bag designed for cold weather use with flexible single or double configurations. Layered fabric and mixed filling provide reliable insulation and moisture control while remaining compact for travel and outdoor activities. Key benefits Keeps you warm in cold conditions: rated for winter use with a comfort range approximately 20 C to 10 C. Versatile single or double use: connects to a second sleeping bag to create a double, or opens flat for use as a quilt. Durable, weatherresistant shell: outer fabrics combine density pileproof waterproof nylon and 210T diamond tearproof polyester for improved tear resistance and water resistance. Effective insulation and moisture management: cottonbottom and down construction with added hollow fourhole cotton and feather fillers for layered heat retention and sweat absorption. Easy entry and temperature control: mummy shape, adjustable drawstring hood, neck collar, and twoway zipper with a windproof zipper baffle reduce heat loss and allow ventilation. Features and specifications Style and fit: mummytype sleeping bag, lengthened design to fit adults 1.8 m to 2.0 m in height. Size and weight: product dimensions 220 x 80 x 50 cm; packed weight 2100 g. Materials: outer fabric includes 300T pileproof waterproof nylon and 210T diamond tearproof polyester; lining is 240T polyester. Filling combines down and cotton layers plus feather and hollow cotton insulation. Temperature rating: comfortable for winter cold weather, approx 20 C to 10 C. Practical design elements: adjustable hood, integrated neck collar, zipper windproof board, twoway zipper, internal pocket for small items such as a phone, and the ability to join two bags together. Portability: compresses into an Oxford cloth compression bag for compact storage and transport. Color options: yellow, red, blue. Intended use: adult coldweather sleeping bag suitable for outdoor and emergency situations. Performance and durability Multilayer construction balances warmth, breathability, and durability for sustained use in cold environments. Reinforced outer fabrics reduce the risk of tearing and resist light moisture to keep insulation functioning effectively. Doublefill and mixed down arrangement deliver consistent loft and heat retention across the bag. Common use scenarios Camping and mountaineering: sleep comfortably at base camps or higher elevations where temperatures drop into the negative tens. Car and road trips: keep a compact, warm sleeping system in the vehicle for overnight stops or emergency shelter. Outdoor work and fishing: use while waiting in cold conditions or during overnight stays at remote sites. What you get One lengthened mummy sleeping bag for adults with layered insulation, twoway zipper and windproof features, internal pocket, compression storage bag, and the option to join a second bag into a double. This sleeping bag is designed to provide robust coldweather performance, flexible use as single or combined double, and convenient packing for travel and outdoor activities.