Minus 10°C is about the coldest you would expect on most high-level treks such as Everest Base Camp, but nights are capable of dipping to -15°C or even below occasionally. 'System 1' uses Yukon clothing to boost the performance of the Hispar 400 bag well below the lowest of these temperatures. 'System 2' also starts with the Hispar 400, then adds Minimus clothing and the ultralight Filler bag to make a very warm and versatile combination offering many usage options.
|This system combines the superb Hispar 400 sleeping bag with the box-wall Yukon jacket. At night the down clothing will boost the whole system to -24°C when worn inside the Hispar bag. In the daytime the Yukon, with its -15°C rating, offers full protection when the trek goes high, and the trousers will really show their worth in a cold camp.|
|This versatile system is based on the superb Hispar 400 sleeping bag. The lightweight Minimus clothing will keep you comfortable through the day and can then join the Filler bag at night in giving the Hispar 400 a boost all the way to -29°C. A good margin even if the weather turns cold.|