Helium 450 -1 to -7°CA 3 to 4 season ultralight sleeping bag designed for minimum weight (only 850g!) & maximum versatility, the Helium 450 has proven popular with hikers in a range of climates from coastal walks to sub alpine elevations. The 450 allows temperature regulation with dual zippers & offers incredible warmth to weight thanks to 800+ loft down. Maximise your pack space with a compact, lightweight and versatile Helium 450 sleeping bag. Ultralight shell fabric
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