If you are traveling and get caught in a snow storm or blizzard, or slide off the road, this emergency kit will probably save your life. It's easy to get lost or disoriented in a snowstorm.
Cars are easier to find than lost people.
Conserve your battery. If you are in trouble, flash your lights three times when a car passes. Batteries go dead fast in cold weather. Get something that stays warm when wet. Down-filled bags are warm when dry, but you'll freeze if they're wet.