This quick and easy snow shelter takes very little time to setup and can make a huge difference in a survival situation.
Based on the quick shelters setup by the Finns when fighting the Russians in the Russo-Finnish war of 1939-1940, these are survival shelters that can be quickly established for an overnight stay in the mountains or backcountry.
How often could you use a quick shelter that can be setup in less than 30 minutes of work? Usually when you see survival shelter videos they are super elaborate structures that can take hours to build. You have to ask yourself if you will always have that much time on your side if night is coming or a huge storm is blowing in.
A simple trench-like snow shelter will get you below the wind shears; the evergreen boughs, with the insulating effect of the snow, will raise the temperature to keep you going. Add in a good sleeping bag rated for winter conditions, and you should be good to go.
Keep this type of shelter in the back of your mind and it can be quickly brought to life if you get stuck out in winter conditions in the future.