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Down Sleeping Bags

Down lightweight sleeping bags are generally warmer and lighter than the equivalent synthetic bags and are still considered best for winter and expedition use where low weight and bulk are important. However, if they become wet they lose a great deal of their insulating properties. They must be washed with great care to prevent damage. They are more expensive but generally more durable and will last longer than synthetic bags.
 

• Duck down – less fine than Goose down but considerably less expensive. Down works by the feathers trapping a layer of air which is then heated by your body heat.
• Goose down – very fine and provides approx. 25% more insulation than the equivalent weight of Duck down.
• Hi-Loft down – This type of down is made from very fine Goose down and provides yet more insulation by trapping more air than any other filling. Used in some expedition bags where bulk and weight are critical.