We display on all our sleeping bags the comfort temperatures tested by an independent laboratory (AITEX) according to European standard ISO 23537-1 of 21/01/2017. The comfort temperature rating is the lower limit at which the user in relaxed posture is generally in thermal equilibrium and feels neither too cold nor too hot (for a standard woman in normal conditions of use). Choose your sleeping bag according to this criterion.

The comfort limit temperature is the temperature limit at which a person curled up in the sleeping bag is in general thermal equilibrium, neither too cold nor too hot (determined for a man in normal conditions of use).

A sleeping bag does not produce heat, but retains the heat produced by the body. If you are tired and cold and you slip inside a cold, damp sleeping bag, it is very likely that you will feel cold no matter how good your sleeping bag is! These temperatures therefore depend on the person's resistance to cold (body type, fatigue, etc.), equipment (mattress with insulation, etc.), clothing (naked, underwear, etc.) and weather conditions (humidity, wind, etc.).

Dress simply (just one layer of clothing is enough). Warm-up your extremities: hats, gloves, socks, hand/feet warmers, friction... A flask of hot water can be used as a hot water bottle (if there is no risk of accidental opening!). Contract your muscles (70% of the energy consumed is converted into heat) but without making any movement generating a cold airstream. To wash your sleeping bag less often, we recommend you use a sleeping bag liner.

Outer fabric and lining: 100% polyester | Wadding: 100% 200g/sqm polyester padding.

We wanted to use a dope dyed two-tone liner fabric and dope dyed yarn to reduce the environmental impact of this product. The yarn is dope dyed during the manufacturing process, avoiding the use of dye baths. One of the threads is dope dyed, the other not. Below, the results compared to a classic liner fabric: - 65.8% emission of fine particles (PM2.5) - 65.6% eutrophication of fresh water - 76.7% eutrophication of water

The environmental impact of the product is calculated based on its entire life cycle and using different indicators. An overall ABCDE score is given to help you easily identify products with the best environmental performance by comparing products of the same type (T-shirts, trousers, backpacks, etc.). Decathlon is a voluntary supporter of this environmentally-friendly labelling approach.