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Temperatures
Until recently, it was extremely difficult for consumers to compare different sleeping bags. The
temperature figures declared by some manufacturers produced more confusion than clarity and in many
cases were quite simply false. The proper selection of an appropriate sleeping bag was thus impeded,
because many bags were simply not tested or not comparable under the provisions of different national
standards.
Since April 2002, EN standard 13537 has set a uniform procedure, binding on all, for how sleeping bags
are tested and the how the results of those tests must be communicated. From 2005, all sleeping bags
introduced on the market must have undergone this test procedure.
SALEWA welcomes the introduction of this standard, because it increases transparency and comparability
for the customer and independently confirms the quality of SALEWA products.
The new EN mode of measurement is distinguished from other methods used previously, so our sleeping
bags have new temperature values.
Tested models are recognised by the special label affixed to them, giving information on the various
temperature margins.
We have all our sleeping bags tested by an independent Norwegian body, the “Institut Thelma”, one of
few European institutes certified for this new standard.
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What does EN 13537 say?
The standard requires that the temperature margins of a sleeping bag are determined on the basis of a
warmth test with a test dummy. The test dummy consists of 20 sectors, the temperatures of which can
be measured separately. The measurements from the sectors and knowledge of the ambient temperature
of the climate chamber give four temperature figures which are explained below. These details are to be
found on the product labels and information on all SALEWA sleeping bags.
Maximum temperature (Tmax):
the highest temperature at which an average man
(80 kg) can sleep comfortably for a night without sweating.
Comfort temperature (Tcomf):
is the temperature at which an average woman (60kg)
can sleep comfortably for a night.
Temperature limit (Tlim):
shows the lowest temperature at which an average man (80
kg) can have a comfortable night’s sleep.
Extreme temperature (Text):
corresponds to the temperature at which an average
woman can survive a night, sleeping no longer being a consideration.
NB:
The temperature figures correspond to laboratory values. In practice it can happen that the feeling of
cold or warmth varies from person to person, and in addition it can be influenced by factors such as
tiredness, hunger or mood.
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