Best practices for maintaining warmth while sleeping outside?

Insulating Your Sleeping Bag

A good sleeping bag can be the key to a warm night’s sleep. Look for a bag with a comfort rating that matches the expected low temperature of the night. For example, a -20°C rated bag will keep you warm in temperatures as low as -10°C. Use a sleeping pad to further insulate your sleeping bag from the cold ground. A pad with an R-value of at least 2.5 is recommended to prevent heat loss.

Creating a Windbreak and Insulation

A tarp or bivy sack can provide vital insulation and protection from the wind. Pitch your tarp at an angle to create a slope that allows snow to slide off. Use stakes and guy lines to secure the tarp and prevent it from flapping in the wind. You can also use snow to insulate your sleeping bag, by piling it up around the edges of your tarp.

Staying Warm Through Clothing and Body Heat Retention

Dress in layers to maintain body heat. A good base layer, mid-layer, and outer layer will help to regulate your body temperature. Use a hat and gloves to prevent heat loss from your head and hands. You can also use a scarf or face mask to protect your face from the cold. To retain body heat, use the “sleeping bear” technique by curling up into a ball with your arms wrapped around your knees to trap warm air close to your body.