First, the dealer has a good service! Has too small boots ordered withdrawn without objection and 1 number delivered bigger! Have me a second pair of boots by SALOMON ordered! As are worlds apart! The Salomon has delivered even at minus 10 degrees warm feet !! That's in which Jack Wolfskin unfortunately not the case! Under winter boots I imagine anything else! Bin all day outside and rely on really warm boots in the winter. The cold came from the top and from the bottom by! For the price I can ask something else !! Too bad Jack Wolfskin.