When selecting the temperature range of your Aegismax sleeping bag you should first check the historical weather forecasts of the area you will be using it in. You can do this by searching online, something like ‘temperature of Routeburn track in July’ as an example. When doing this you can find the temperature range during this time is between 1°C and -9°C.
With this in mind a sleeping bag should at least cover the lowest expected temperature. We suggest the extreme rating is ignored and taken out of the equation as this rating is pretty much the rating to only just keep you alive. When referring to the minimum temperature we will consider the Limit rating only.
So for a sleeping bag to cover this range using the Aegismax sleeping bag range there are two options, the G3 and G2. The G2 has a lower limit of -8°C which is slightly short of the potential -9°C. This Aegismax sleeping bag should be okay as you are likely to be staying in a hut or tent which will be warmer than the potential outside temperatures. If you really want to be warm then the G3 could be a better way to go as it has a Limit rating of -15°C.
When selecting the right sleeping bag, especially during the colder months it is always best to go on the side of caution and select a warmer sleeping bag. This is in case of emergency should you not make it to the hut of shelter campsite in time. Using a sleeping bag liner will add a couple of degrees to the lower limit.
Please note sleeping bags are rated assuming the user is wearing a base layer from head to toe. This is because the sleeping bags main purpose is to keep you warm at night when the temperature drops and your body is less active.