Fashion trends take a backseat to frostbite warnings when temperatures feel like 15 to 30 below. Dangerous wind chill and blizzards leaves exposed skin at risk to becoming too cold or wet. And in those conditions, all it takes is 30 minutes for extremities to become numb, blister and suffer from frostbite, or even worse, hypothermia.

Dressing for temperatures that can feel below zero calls for all the right tips to stay warm. But beware of layering up with the wrong wardrobe picks that could actually make you colder. Too many socks or the wrong fabric choice are major fashion (and health!) mistakes this time of year. Avoid these 9 style blunders to stay cozy even on the coldest winter days.

Click through the gallery to check out 9 major fashion mistakes to avoid this winter.