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 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).t° limit (for men)
Some manufacturers use their own criteria to indicate this temperature, but the generally accepted standard is EN13537. According to it, the comfort limit t 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) without waking up from the cold in a heat-saving position (curled up). Of course, in each individual case, comfort will also depend on the characteristics of the body and the training of the tourist.
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.
t° limit (for women)
Some manufacturers use their own criteria to indicate this temperature, but the generally accepted standard is EN13537. According to it, the comfort limit t is the lowest ambient temperature at which a woman in thermal underwear can sleep in a sleeping bag all night (at least 8 hours) in a heat-saving position (curled up), maintaining thermal balance. Of course, in each individual case, comfort will also depend on the characteristics of the body and the preparation of the tourist.
Bag dimensions
Dimensions of the sleeping bag when unfolded. Although the designation of sizes includes the traditional three numbers, in the case of sleeping bags there is a peculiarity: these numbers do not indicate length, width and height (depth, thickness), but length, width at the shoulders and width at the legs. For example, the designation 220x80x50 means 220 cm in length, 80 cm in width at the shoulders and 50 cm in width at the legs (for more information about sleeping bags with different widths, see “Type”).
It is believed that the optimal sleeping bag sizes are:
- Length - 15-20 cm more than a person’s height (for sleeping bags with a hood) or his height to the shoulders (for sleeping bags without a hood).
— The width at the shoulders is such that the sleeping bag fits tightly and at the same time does not interfere with movement.
— The width in the legs (for cocoons, see “Type”) is such that you can slightly bend your legs without tension on the fabric of the sleeping bag (otherwise heat loss is possible, and it will wear out more).
Note that these requirements apply primarily to sleeping bags intended for use in cold weather. If you are purchasing a sleeping bag for summer trips, the width requirements are not so critical - the main thing is that it does not feel cramped and the length matches.
Of course, when folded, the sleeping bag takes up significantly less space - see “Dimensions (folded)”.
Recommended height, up to
The height of the person for whom the sleeping bag is designed. For more information on choosing the correct size of a sleeping bag, see the paragraph "Length".
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.
