Some manufacturers will give you a waist bag rating of 15 ° C another electricity tariff to -2 ° C. The EU has confused things by introducing a different classification system. This system uses four different temperature ranges: the upper limit – the highest temperature at which a normal person would have a good night’s sleep without sweating.
It’s much easier than trying to figure out temperatures. The weight and size of the waist bag is not relevant if you are traveling by car, so the choice is cheaper. There are many man-made fills, which provide different efficiency.
I think there is a big advantage over the other one, just choose the one that fits your needs for the season championship and weight / size. Best performance for weight, is generally considered a true bottom. However, these waist bags are very difficult to clean because they do not like getting wet. Most waist bags come with a mummy left or right hand ZIP.
As a rule, you can squeeze a waist bag of left hand right hand waist bag to make a double. Therefore, make sure that both options are available in your zip option if you want to be able to waist bag. But keep in mind that doing so may reduce the thermal efficiency due to the hole, which is created on the shoulder between employers.