How to keep warm in the tent?
The general tent because of the material problems, flammable, so it is not suitable for internal heating, and the other is because it is generally closed in the outdoor, common fire heating is more dangerous.
General in the outdoors, if you want to keep warm, usually use multilayer with rainproof windproof layer tent, in addition to select appropriate sleeping bags are also key pad, if can use the air cushion it would be better to keep warm, in short, sleeping bags, tents and clothing itself is the key to keep out the cold.
Sleeping bags are bags for sleeping. At present, most of the sleeping bags in the market are marked by comfortable temperature and extreme temperature. The comfortable temperature is a series of temperature that users sleep during the whole night, with the highest and lowest limit. The highest comfort temperature is the heat that is felt in the sleeping bag but not a lot of sweat. The general definition is that the sleeping bag zips open, the arm is outside, and the sleeping bag does not tighten the head.