In my eyes, they are as great as superman in western world. However, as an ordinary person, you may need a sleeping bag and a military tent, both of which are to protect you from been assaulted and froze off. Sleeping bag as a commercial products, the production and business start labeled in sleeping bags for consumers when buy can need according to his selection, just start labeled is very simple, only the summer, three quarter and winter USES three distinguish, this method is the distinction between the rough, with only the use of probably temperature choice. Later on, some brands of sleeping bag began to give two is a numerical: comfortable temperature and temperature extremes.We also deal with military tents.We are one of the famous tent manufactures.So if you have interest in our sleeping bags or military tents ,please contact us.