Odin reigned supreme in Nordic mythology. In return for his wisdom, he had to give up his one eye to Mimer, keeper of the fountain of wisdom. We are not claiming your eye in return, but it might be wise to include an Odin in your next expedition. With an extreme rating of -40°C (-40°F) and weighing in at a mere 1836 gm (4 lb), this is the bag of choice for lightweight expeditions and serious mountaineers who spend their time outdoors all year round. All bags in the series are differential cut.