The Elevation 400 sleeping bag is one of Berghaus' most protective bags, capable of providing a snug night's sleep at low temperatures. Natural white goose down approved by the ethical standards agency, 'RDA' fills the bag, with increased power around the peripheries at the head and neck. The down has been treated with a hydrophobic substance and the ripstop nylon outer has been coated in a DWR finish ensuring a comfortable night's sleep in cold and wet conditions.