3 Types of temperature
- Bags for summer use (above 1 ° C)
- Those called “three seasons” between (-1 ° C and -15 ° C)
- Winter bags (side between-15 ° C and-40 ° C)
3 Types of shape
- The mummy bag: Maximizes heat retention; so it’s perfect for cold temperatures. It is narrow at the feet, widening shoulders and shrinks again to form a tight-fitting cap and well insulated. Adjusted bag has a warmth-weight than a roomier bag of the same thickness. However, some people find these too narrow bags.
- Barrel bag: Do not have cap, it is slightly adjusted and the wider end is oval. It is more spacious than the mummy bag, but offer a lower thermal efficiency. This bag model is suitable for the summer or for a three-season use. It is a compromise between the previous two categories, combining both good calorie qualities and more space to move the mummy.
- The rectangular bag: Is actually a padded cover to slide. It is not particularly warm, but it is cheap and spacious.Its weight and volume make it less practical for stays in nature.
2 Types of insulation
Insulating materials can vary, so it is very difficult to argue that is better. By cons, we must outlaw any sleeping bag made of cotton. This material absorbs water and moisture. As for the insulating materials used by manufacturers, the experts debate focuses on the choice between the down or synthetic materials. To help you in your choice, and without going into all the technical details clean every manufacturer, say the down is the most efficient insulation, weight for weight, but by cons, its sensitivity to moisture and difficulty maintenance make a difficult choice. It is especially effective for large dry cold northern regions or high mountain. Synthetic materials developed in recent years allow to obtain very respectable performance for all three seasons bags for example. Add to this natural resistance to moisture, these fibers have thus become the most popular with outdoor enthusiasts.
The warmth-weight, compressibility and resilience of the down used to establish standards to classify all other insulation materials. Down the plumules are not mere pens; they are in fact envelopes of tiny fluffy filaments that are under the feathers of waterfowl. However, most of the products isolated using fluff contain a certain amount of feathers and feather fibers.
– Down is a natural product that offers unbeatable heat-weight relationship
– Its compressibility makes it ideal for people who like to travel light
– Maintained properly, it can last for decades
– After wet , down loses its insulating power
– it slowly dry in the open air
– it is more expensive than synthetic insulation
currently, MEC uses two types of synthetic insulation in the manufacture of its sleeping bags – the Hyperloft and PrimaLoft® PL1. It is made of different thicknesses of short discontinuous fibers bonded with resin and by thermal melting to create a lightweight fill, compact and durable which provides a good thermal efficiency even when wet, which absorbs very little water and dries quickly.
– It costs less than a fluff
– it keeps a certain volume and a certain power insulation even when wet
– It dries quickly in the open air a duvet
Points to consider:
– The volume, weight and long-term sustainability vary from synthetic insulation to the other (more particularly in the case of lighter Pads);
– The synthetic insulation are larger and heavier than down.