It's late in the season, the leaves are falling, and the tent's cold. But we're not: we're wrapped up in the Onesource Heated Sleeping Bag from Coleman. Aside from its heat-retaining shape and design, the Onesource features dual heating pads at the core and feet to ensure we're warm until the morn. Its four adjustable modes evenly distribute heat and can crank it up for two hours on high, two and a half on medium, four on low, and three on pulse.