by neilmny » Mon 17 Jun, 2013 12:22 pm
I think you have to choose based on your local temperature knowledge.
We chose the Trek3's because we wanted something warmer (and lighter), kind of 3 1/2 season approach for Victorian weather - comfort rating -5C.
Keep in mind their rating is comfort rating so theoretically a female should sleep well at the comfort rating and a male should be
well warm, as is our experience on our initial use of the bags. Reading the S to S blurb on the ratings helps to make sense of it.
As I mentioned I opened the bottom of my bag to drop the temp a bit and you can always just use it as an open quilt as well.
Your Trek 1 is EN tested Temp rating: -15c extreme, 5c to 11c Comfort factor, 0C lower limit
I really can't recommend which way you should go, sleeping comfort is a very individual thing.
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"The EN13537 standard provides three temperature levels to guide a consumer in their choice
Comfort - the temperature at which a standard woman can expect to sleep comfortably in a relaxed position. If you consider yourself a cold sleeper use this rating to decide the coldest temperature the sleeping bag is suitable for.
Lower Limit - the temperature at which a standard man can sleep for eight hours in a curled position without waking. If you consider yourself a warm sleeper you can use this rating to decide the coldest temperature the sleeping bag is suitable for.
Extreme - this is a survival only rating for a standard woman. Between the lower limit and the extreme rating a strong sensation of cold has to be expected and there is a risk of health damage due to hypothermia. This is an extreme survival rating only, we do not recommend you rely on this rating for general use."