The warmest bag in Mountain Hardwear’s superlight down series, the Phantom 0 features top grade 800 fill down insulation, an efficient mummy cut and superlight fabrics to give a bag that shaves ounces and maximizes warmth. Tight 5” baffle spacing prevents cold spots, while face gasket, a tailored hood and insulated draft tube with ergonomic collar efficiently seals in warmth. Available in left hand zip only.