Sleeping bags with synthetic insulation

 

— synthetic fibre insulation, usually based on polyester. Provides good thermal insulation, but loses in this indicator to natural fluff; in addition, during long-term storage in a compression bag, the insulation becomes denser and its characteristics deteriorate. On the other hand, synthetics are not at all afraid of moisture: it not only dries easily, but also retains most of the heat-insulating properties even when wet, and the heat-insulating properties themselves are quite sufficient even for winter sleeping bags.