The Nanok comfort range offers high down quality with fill power 500+ & a 90/10 mixture of down & feathers, gives a very soft & compressible bag with long lifetime. Constructed as a box, the optimal distribution of down & the prevention of cold spots are secured. This down bag is the perfect choice for the weight conscious hiker / trekker who wants a light weight high performance 3 season down bag, but with some additional comfort.