Late-season camping trip or backyard get together coming up? Stay warmer with the Coleman OneSource Heated Sleeping Bag. The mummy-shaped bag keeps you warm in temperatures as low as 32 degrees F using 2 heating pads one at the core of the sleeping bag and one at the roomy footbox distributing heat throughout. Power your heated sleeping bag using the lithium-ion rechargeable battery, an interchangeable battery that works with all Coleman OneSource products, and eliminate the need for multiple power sources by charging your devices through the USB port. One fully charged battery gives you 2 hours on high (107 degrees F), 2.5 hours on medium (103 degrees F), 4 hours on low (96 degrees F), or 3 hours on pulse setting (low to high) of warmth. Spend more time relaxing and double the runtime by adding a second battery (sold separately) to the dual port dock that also charges your phone or other devices. A semi-sculpted hood and double batt, offset quilt construction surround your head and body to help eliminate potential cold spots. The Thermolock draft tube prevents heat loss through the zipper and Coletherm insulation provides better heat retention with less weight. The ZipPlow zipper means a snag-free opening and closing. A durable, ripstop-reinforced polyester cover ensures you get to use this sleeping bag season after season and it's machine washable for easy cleaning after you remove the heating pads, wires, dock, and battery. When you're ready to head home, pack the sleeping bag inside the included stuff sack.