Terra Novas new Elite down sleeping bags are probably one of the lightest and warmest ranges available for serious mountaineers. High quality 900 Fill Power goose down and superlite down proof fabrics create comfortable bags that are the closest you can get to just carrying the down! These sleeping bags have all the quality features you would expect from an elite winter sleeping bag, from box wall construction to zip baffles and welded seams. The Elite range of Terra Nova down Sleeping bags come in 3 variations, the 300, 600 and 900. The lightest down bag, Elite 300, weighs just 330g (11.7oz) and has a temperature rating of +10°C to -2°C. The heaviest down bag in the range, Elite 900, still only weighs in at 990g (34.9oz) and has a temperature range from -10°C to -26°C.