The Sea to Summit Spark Women's -9°C sleeping bag was developed for women who want maximum comfort on their adventures ranging from spring to autumn or even mild winter. The women's specific mummy fit is narrower at the shoulder and wider at the hip, and features extra down compared to the unisex Spark models.Treated with a PFC-free Ultra-Dry down process, the RDS-certified goose down filling with a fill power of 850 provides excellent insulation, while a technical hood and zip drawcord prevent valuable warmth from escaping.  A super-breathable 10-denier nylon inner material ensures comfort, while the 10D outer material with a PFC-free DWR coating and a highly water-repellent hood and foot box block wind and condensation.The Spark Women's -9C features a full-zip model can be combined with an equivalent unisex Spark sleeping bag, so couples can share the comfort.