A buddy of mine taught my during my first fall&#x2F;winter in the Yukon, I was lucky to get a great crash course from him.<p>Don&#x27;t wear anything made of cotton - it actually makes you feel colder. Throw it all out.<p>Wear Marino wool against your skin.<p>Wear multiple layers like base, mid, outer, possibly even one more when it&#x27;s cold.<p>Spend big bucks on your base layer and outer layer. Carry multiple pairs of gloves.<p>After a day of activities, change all your clothes. They&#x27;re damp and you don&#x27;t know it.<p>When it&#x27;s cold, don&#x27;t put your bare hands on anything - the heat will be sucked out of them and it can take hours to nurse them back to good again.<p>Always, always, always carry a thermos of hot liquid, bomb-proof fire starting kit, and a spare change of clothes. When it&#x27;s that cold, things go wrong, and you must be ready. My friend does this when only going 10 minutes from his own house. At -40C, you won&#x27;t be OK for the ten minutes if you get wet or something else serious happens.