A women specific design with extra insulation in the torso and foot areas makes the Mountain Hardwear Heratio Sleeping Bag an excellent choice for female campers and backpackers. ThermoTrap Baffle construction secures 650 fill down insulation in smaller chambers to keep the down in place across the entire bag, and the down's Q. Shield treatment helps it resist moisture to retain its heat trapping loft and maintain its warmth in sub freezing temperatures. Its comfort mummy cut provides a slightly larger shape than standard mummy bags for extra relaxation without adding weight. Mountain Hardwear made the Ratio's shell out of dobby for durability, and the taffeta lining is smooth to the touch for extra comfort. The down filled face gasket at the hood and the insulated draft tube across the zipper keep chilly drafts out of the bag throughout the night. The hood features single handed drawcords that cinch snugly with a simple pull.