In the January issue of the leading German magazine Outdoor they highlight Nordisk Mos down shoes as highly relevant for the season.
If you haven't tried them yet, you definitely should. And if you haven't got any more pairs in your shop - order them now!
Have a nice warm winter :)
See Mos here:http://www.nordisk.eu/products/sleeping-bag-acc/sleeping-bag-acc-detail/type/sleepingbag-accessories/categories/mos-down-shoe-red/product_model/s-1/