Because of your brave shoveling soul, once it gets as cold as -20c here in Boston, I will try how B&W P5 Wireless holds up in the cold. If they survive, then I would expect V-Moda to survive as well. Worst I could think of happening is that there will be water formation due to condensation when bringing headphones from outside to inside, which could then damage the electronics.
However, I'm 95% confident the headphones will handle the cold better than I do.
Not that im trying to see who is coldest but i have used my M100s in -50/-60 below here in Minnesota, I use them as a ear warmer and for music when using the snow blower.