SEA TO SUMMIT VENTURE SYNTHETIC SLEEPING BAG - WOMEN'SDESCRIPTION The Venture(TM) women's synthetic mummy 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(TM) construction allows the Thermolite(R) insulation to expand out into air-trapping curves for maximum warmth, and the overall wider mummy shape of the Venture matches your natural sleeping position for supreme comfortWhatever the weather conditions - make sure you pack this bag before you venture out.FEATURESHigh-quality Thermolite(R) insulation is loftier and more durable for lasting warmth.Full-length YKK(R) #5 main side zip and foot box zip provide superior ventilation and allow the bag to be used as a comforter.Shaped hood and zipper draft tube keep the cold out and warmth in (Venture 23degF also has a draft collar)Form a snug double sleeping bag by zipping to any Ascent(TM), Trek(TM) or Traverse(TM) sleeping bagIncludes lightweight 70D nylon compression bagvTECH SPECSBest UseBackpackingPerformance2 Season: 32degF (comfort range 32degF to 75degF)2.5 Season: 23degF (comfort range 23degF to 70degF)Designed to keep women warm withThermolite(R) insulation placed throughout the bag using body-mapping to maximize warmth for a woman's physiologyA wider mummy shape between hips and knees to allow you to sleep in a natural position without compressing the insulation and creating cold spots. Shorter overall length and narrower girth in shoulders to reduce dead space and increase thermal efficiency