Mountain Hardwear Heratio 15F/-9C Down Sleeping Bag - Women's goretex Q.Shield DOWN 650-fill down has an advanced treatment applied that resists heat robbing moisture and retains maximum loft in damp conditions Increased insulation to set temperature ratings to T-Comfort for warmer womens bags Unique Thermo Trap Baffle locks down into smaller chambers for less down migration, even loft height and more consistent warmth Women-specific comfort mummy cut efficiently maximizes warmth without constriction, with extra insulation in the torso and foot areas Down-filled face gasket comfortably blocks drafts at the hood opening