The vaude serniga 500 down sleeping bag is a highly technical 4 season sleeping bag for the most extreme expeditions filled with 9010 white goose down and designed in a mummy shape for maximum insulation this is a seriously warm sleeping bag the classic mummy shape also cuts out unnecessary material reducing pack size weight and bulk keeping your head warm is an essential element in maintaining body heat the serniga 500 features a highly insulating snug fitting hood for this very reason vaude h