Weight
Since a sleeping bag is a travel outfit, its weight can be one of the key characteristics. Two points should be taken into account here: firstly, more insulation usually requires more material and increases weight, and secondly, warm models with low weight are much more expensive than heavier options with the same temperature characteristics.
Also, when choosing a sleeping bag, you should decide what exactly you are buying it for. If we are talking about picnics, festivals and other simple trips to nature without long walks, or if you plan to carry equipment by car, you can not pay much attention to weight, focus on other characteristics. If you plan to go on long hiking or cycling trips, you should choose a model with a minimum weight.
As for specific numbers, most modern sleeping bags are in the range of
1.1 – 1.5 kg or
1.6 – 2 kg, although there are quite a few ultra-light models —
1 kg or less. An indicator of
2.1 – 2.5 kg is already considered quite significant, and a weight of
2.6 – 3 kg or
more is found mainly in two types of sleeping bags: separate expeditionary models with a high degree of insulation, as well as double products.
comfort t° (for women)
The comfort temperature of this sleeping bag.
Some manufacturers use their own criteria for specifying this temperature, but EN13537 is considered the generally accepted standard. According to this standard, comfort t is the lowest ambient temperature at which a woman in thermal underwear can comfortably sleep in a sleeping bag all night (at least 8 hours) in a relaxed position without waking up from the cold. This definition is taken from the considerations that women are more likely to get cold during sleep than men. Of course, the actual comfort will depend on the characteristics of the body and the preparation of a particular person. However, most likely, at ambient temperatures at the level of comfort t and above, it will be comfortable (or even hot) in a sleeping bag for any user, regardless of gender. For details on temperature selection features, see "comfort limit t" below.
Specific values of t comfort in modern sleeping bags can often be
-5 ..-9 °C, or even
lower, however, there are also models for hot weather —
+ 10 ... 15 °C and even
higher. At the same time, we note that seasonality and the possibility of winter use are not strictly related to this indicator: in particular, winter models can have a comfort t of +15 °С, or even +20 °С.
comfort t° (for men)
The comfort limit temperature of this sleeping bag.
Some manufacturers use their own criteria for specifying this temperature, but EN13537 is considered the generally accepted standard. According to him, t of the comfort limit is the lowest ambient temperature at which a man in thermal underwear can comfortably sleep in a sleeping bag all night (at least 8 hours) in a heat-saving position (curling up) without waking up from the cold. Such criteria are used taking into account the fact that men are less likely to get cold during sleep than women, and the acceptable temperature for them is slightly lower. Of course, in each individual case, comfort will also depend on the characteristics of the body and the preparation of the tourist. However, in general, the general rule is: if the sleeping bag is used by a man, then the minimum temperature at the place of lodging should ideally be between comfort t and comfort limit t; for a woman, a few degrees must be added to the comfort limit t, and it is best to focus on comfort t (see above).
This indicator is quite closely related to seasonality. So, for winter use, t of the comfort limit should be
less than -4 ... 0 °C ; in the warmest models, it can be very low,
-15 °C and below. In purely summer and even spring/autumn models, there are values of
+10 °C and even higher, however, if you are afraid of sudden col
...d snaps at night, it is advisable to choose sleeping bags with indicators of at least +6..10 °С, and preferably +1...5 °C(especially for the off-season).extreme t°
Extreme temperature of this sleeping bag.
Some manufacturers use their own criteria for specifying this temperature, but EN13537 is considered the generally accepted standard. According to him, the extreme temperature is the temperature at which a well-trained female tourist of a dense physique (height 160 cm, weight 60 kg) in thermal underwear can spend the night (at least 6 hours) in a sleeping bag in a heat-saving position (“kalachik”) without the risk of hypothermia. Such criteria are taken from the considerations that a person's resistance to cold depends on gender (women are colder than men), physique (thin people are more sensitive to cold) and training. It is worth noting here that if you are not used to hiking conditions, then the extreme temperature should be considered as the lowest temperature at which you can spend the night in a sleeping bag without risking your life. At the same time, there is no question of comfort, in addition, there is a high probability of hypothermia; so at such temperatures, not only high-quality thermal underwear, but also additional insulation may be required.
Dimensions (folded)
The dimensions of the sleeping bag when folded, when packed in a complete cover; if this cover is made in the form of a
compression bag(see "Equipment"), then the dimensions are indicated with the compression straps tightened to the maximum.
Other things being equal, the smaller the size of the sleeping bag, the more convenient it is in storage and transportation. At the same time, more compact models are usually more expensive.
