Camping, tent is absolutely indispensable equipment. However, the tent brands on the market today and many kinds, if only amateur players, which of the selected tent cost-effective? Tent the best Alpine seasons account or posted a double double, waterproof and warm better. Waterproof in accounts outside 2000mm, above 3000mm; pole preferably aluminum air, its advantages are: high strength good pressure resistance, light weight is not easy to break and long service life. Disadvantage is the price a little high, but selected FRP rods is not recommended because its price is low but easily short life and very heavy. Accounts suggest double door, the door is double layer on the screen door of a layer, not only easy access to thermal coefficient is high, and on both sides in hot weather when the doors are open you can also play a role in ventilation and cooling.