THE "COMFORT" TEMPERATURES SHOWN ON QUECHUA SLEEPING BAG COVERS ARE DEFINED BY STANDARDISED EUROPEAN TESTS. HOWEVER, SENSITIVITY TO COLD VARIES GREATLY DEPENDING ON THE INDIVIDUAL AND THE WEATHER CONDITIONS.
CHOOSE THE RIGHT SIZE OF BAG
...and a comfort temperature adapted to your use. If your sleeping bag is too big the pockets of cold air produced inside can actually cause a feeling of coldness.
Conversely, if your bag is too small, it may not cover you up enough or you may be too tight inside it and end up being cold. And if the heat of the bag is not adapted to the environment in which you will use it, you risk being automatically cold.
ADJUST THE HOOD AND THE OPENING AT THE TOP OF YOUR SLEEPING BAG.
A large proportion of heat is actually lost via the head (about 30%)! This is why it is important to tighten the cords of the sleeping bag hood so that only your face is outside.
USE A MATTRESS
This enables you to be insulated from the ground on which you camp which is often cold or even wet.
KEEP COVERED UP BUT NOT TOO MUCH!
Merino wool undergarments are ideal, they are thin, worn close to the body and release body moisture.
Bonus: Merino wool is anti-odour!
INVEST IN A SILK SLEEPING BAG SHEET
You won't regret it!~It will provide you with several additional degrees of warmth and you will appreciate its wonderful softness after a day of hiking.
THE EXTRA LITTLE THING!
If the temperature of use of your sleeping bag is above the outside temperature you can try to gain a few extra degrees by wearing gloves and a hat.
Hand or feet warmers can also help as and when required (in accordance with the instructions for use).