A tent is mainly composed of tent poles, outer tents, inner tents and tent nails. The main indicators are body shape, height and weight. These poles are used to shape the tent and store it in several parts. Elastic rope puts them in the middle, so they can be easily connected when used. The strength of the pole is very important. Once folded, the tent will become a bag, which is a severe test for the tent pole in the heavy wind and snow (the tent is covered with snow). Tent poles are prone to problems. Generally, tent poles are made of FRP and aluminum alloy, and aluminum alloy has higher strength. Internal accounts are relatively light. When the temperature is high and the weather is fine, only internal accounts can be supported. The outer account has no bottom, so the bottom of the inner account is waterproof. The outer tent is windproof and rainproof, and there are different hall designs. Generally, tent poles are put on the inner tent, then propped up, and finally the outer tent is hung and nailed. Another kind of tent is to put the inner tent flat on the ground, put the poles of the tent into the four corners, first support it, hang the outer tent to resist the cold wind, and then hang the inner tent on the poles. The structural design of these two tents is different. The tent is equipped with a small mountain tent, and the double tent is 1.3m*2m. There is also the height, the tourist account is high, 1.5m or more, which is comfortable, but the windward area is large, which is not suitable for harsh environment. The mountain account is low, and you are not afraid of strong winds on the ground. Of course, the lighter the same quality, the better. Tents are mainly suitable for three purposes: first, leisure, no bottom layer, no material requirements, easy to carry, mainly used for sun protection and temporary rest in leisure places such as beaches; Second, general outdoor tents have a bottom layer, which requires relatively high materials. They are made of glass fiber reinforced plastic poles, which are light and portable. 3. Special tent for high mountains. The upright post of the camp is made of aluminum alloy, and the outer layer of the tent is tear-proof. Tents are not often used, which does not mean that the choice of tents can be arbitrary. On rainy days, it is very frustrating to find that your tent is leaking, and the whole mood may become wet. Therefore, how to choose a tent with good quality, strong applicability and reasonable price must not be sloppy. If you are buying a tent for the first time, you may not know where to start among the many dazzling goods. In fact, there are some factors to consider when choosing a tent, but they are not complicated. Grasping the following points can help you make the right decision. Can a tent lie in a sleeping bag to provide enough length? Is there enough vertical space? Do you feel panic when you sit inside? The longer you plan to stay in the tent, the more space you need. To prepare dinner in a tent, you need a tent with special ventilation. Making some hot coffee or instant noodles can make people feel comfortable, but if you use a stove in a tent, there should be enough space in the tent to ensure safety. Theoretically, it can keep the tent warm or cool, and it is better insulated from the external environment. Tents may be used, but when choosing a tent, its manufacturing process determines its durability. A well-made tent can be used many times without any problems. A tent with good craftsmanship must first have fine stitches at the seams, and it should look as strong as jeans by four-layer double-row sewing. Strong sewing can provide greater strength and better waterproof performance. In the part of the tent where the stress is concentrated, it should be reinforced suture. Pull the suture of the tent hard, and the stress should be uniform in all places. Uneven stress will lead to premature failure in concentrated places. Waterproofing is one of the important indexes for choosing tents. Better materials and better waterproof are the decisive factors to keep the tent dry and comfortable. But sometimes it rains constantly, even the best tent may be wet, because you will bring in some water when you go in and out of the tent, and the bad weather makes it impossible for these water vapor to escape from the tent. There are still some problems to consider about the color of the tent. When buying tents, you usually choose bright and unnatural colors to facilitate others to find and rescue.