Stay warm and comfortable in cold conditions with a heated sleeping bag that combines reliable warmth, durable construction, and USB-powered portability. Key benefits Reliable warmth in extreme cold: Built-in adjustable heating system with 3 temperature levels (low / medium / high) and even heat distribution technology provides consistent warmth from -20°F to 68°F. Ideal for maintaining body heat in winter camping and cold-weather emergencies. Long runtime with common power sources: Operates on standard 5V/2A portable batteries (not included) and is compatible with car chargers, mobile power packs, and laptop USB ports. Continuous 8-hour runtime on medium setting gives overnight performance without specialized batteries. Durable, low-maintenance construction: Tough polyester fabric combines softness with ruggedness. Reinforced stitching withstands 500+ washes while maintaining thermal efficiency, so the bag stays effective through repeated use. Better heat retention and comfort: Cold-lock design with an adjustable elastic neck cord creates a windproof closure that reduces heat loss by 60% compared to regular sleeping bags. Breathable side panels prevent overheating and moisture buildup during activity or sleep. Outdoor-ready design: Outdoor blue color blends into campsite and field environments while the build focuses on function and longevity. Features at a glance Heating: 3 temperature levels (low / medium / high) with even heat distribution technology Temperature range: Consistent warmth from -20°F to 68°F Power: USB-powered, works with standard 5V/2A portable batteries (not included); compatible with car chargers, mobile packs, and laptop USB ports Runtime: Continuous 8-hour runtime on medium setting Material: Sturdy polyester with reinforced stitching; 500+ wash durability while maintaining thermal performance Design: Cold-lock adjustable elastic neck cord; breathable side panels; outdoor blue finish Intended uses: Winter camping and cold-weather emergencies (specified); suitable for other outdoor and roadside situations Practical use scenarios Winter camping: Maintain a steady, adjustable heat level through the night. Use a 5V/2A mobile power pack to supply up to 8 hours on medium, reducing the need to rely on bulky fuel stoves or indoor heating. Cold-weather emergency kit: Keep the bag in your vehicle or emergency kit for roadside breakdowns or unexpected weather. USB compatibility with car chargers makes it straightforward to power while stranded. Outdoor events and fieldwork: Use during long hunting trips, night fishing, stargazing, or overnight field shifts where wind protection and controlled heating improve comfort and focus. What to expect Easy to use: Plug into a compatible 5V/2A USB power source, choose low/medium/high, and adjust the neck cord to seal out drafts while breathable side panels prevent overheating. Durable care: Polyester construction and reinforced stitching are designed to endure frequent use and 500+ washes without losing thermal efficiency. Power notes: Portable batteries are not included; use standard 5V/2A power banks, car USB outlets, or laptop USB ports for operation. Continuous 8-hour runtime applies to the medium setting. This heated sleeping bag delivers adjustable, evenly distributed warmth, proven durability, and USB convenience for winter camping, emergency preparedness, and extended outdoor use.