It is important to understand that in a sleeping bag is not any heating element, i.e. it does not heat. Its function is to achieve an optimum temperature to sleep in a nice position, thus preventing the heat generated by the body itself escaping abroad. It is basically an insulating element which should ensure maximum possible isolation, even in the most extreme environmental conditions. For this reason, according to the place in which it is to use the sleeping bag, the requirements will be more demanding. It is not the same to sleep in a tent in the high mountains that sleep in a shelter, make bivouac or use the sleeping bag at a campsite at the level of the sea. (more…)
Like many outdoor items, sleeping bags are 99% have a down or synthetic insulation. Each with its advantages and disadvantages, simply target the use you make of your sleeping bag to determine the type of insulation that best suits your needs.
There are obviously different insulating qualities of down. You may have noticed the numbers that follow the words down: 550, 600, 650 … 800. This corresponds to the down swelling capacity; the higher the number, the higher it is quality.
By cons, the figure does not correspond to the heat that provide insulation, rather it depends on the amount of fluff inserted into the sleeping bag.
Thus, for 1 gram insulation, down 800 will be hotter than 550 fill down.
Please note that it is quite normal to see fibers escape from the sleeping bag; this is not a sign of a manufacturing defect nor a sign of inferior quality, the warmth of your sleeping bag will not be affected. The most important is not to pull on the fiber, but rather to try to place it inside. It’s the same technique that should be used if your down coat loses its feathers .
Based on topbbacolleges, the advantages of down sleeping bags are mainly lightness and compressibility. It is therefore ideal for expeditions. Despite the water-resistant coatings applied to the insulation, moisture can still affect the thermal capacity of down, so it is especially appreciated for fresh and dry environments.
In brief: lightweight, compressible, warm, durable, less effective in high humidity and very comfortable.
Synthetic insulations are usually sleeping bags heavier and less compressible. However, they are ideal for high humidity since they retain their heat capacity. The possible arrival on milkweed market promises much in the field of synthetic insulation. It is ideal for very wet areas or for casual campers have access to a car since the compressibility and weight are then less of a factor.
In brief: inexpensive, heavier, less compressible, retains its thermal capacity when wet, not allergen.
Keystone Construction: Used in shipping sleeping bags Down, this construction allows positioning the opposite side face to face to eliminate possible ‘cold spots’, to keep a constant volume while keeping the down in place.
Two different outer fabrics: on top, a blue 22-denier ripstop nylon fabric, beneath a gray fabrics 30 denier Nylon Taffeta (see video). The blue part has a “ripstop” mesh (small squares) avoids a possible tear to expand, the gray area has a higher denier, more abrasion resistant;
The lining is gray goose down Hungary , 90/10, 650 cu.
Synthetic fibers are an alternative to down which have the advantages of being more resistant to moisture but also more economical. They are for people who make very long journeys where a cleaning may be necessary, or have something else to manage the humidity in their sleeping bags.
- Test Location: Vercors, Jura, Massif du Grand Arc
- Number of nights: 5
- Accommodation: tent bivouac shelter
- Terms of the bivouac: Medium Altitude: 1200 to 1800 meters
- Conditions: -Month fees in May / June
- Clothing Technical underwear wool
- T ° mini noted: 5 ° C (the Jura)
- Test Location: Jura, Vercors, Grand Arc
- Number of nights: 7
- Accommodation: Tent camp with beautiful star-on bag + a night house
- Terms of the bivouac:
- Conditions: 5 ° C to 17 ° C
- Clothing: underwear or dressed at the bivouac in the open (cool and wet)
- Recorded T ° min: 5 ° C