Women's Venture Synthetic Sleeping Bag 23F - RegThe Venture women's synthetic sleeping bag brings new levels of versatility to the realm of synthetic insulation sleep systems. A full length right side zipper, a half length left side zipper, and a foot box zipper provide unparalleled ventilation or allow the Venture to be opened completely flat like a comforter. The unique WaveLoft construction allows the Thermolite insulation to expand out into air trapping curves for maximum warmth, and the