Staying warm in a sleeping bag can be a bit of a tricky endeavor, but having the proper gear and knowing how to use it all is probably the best way to ensure a warm night’s sleep.
The best sleeping bag is one that fits you and is appropriately insulated for your conditions.
It is best to choose a sleeping bag that is rated colder than the coldest temperatures you’ll be sleeping in. You can always unzip your bag if you’re feeling too warm.
Yes, a good quality sleeping bag might keep you warm, but sleeping on a good quality sleep pad under your warm sleeping bag will keep your warmest.
You should wear snug-fitting, wicking long underwear (or base layers). No, you should not wear your birthday suit.