... : the wild temporary habitation of field investigation, camping, exploration, the construction , flood control and disaster relief.Tents material:1 )square tubes ... .2 MM , tube is relatively stable structure. (1.6 meters high, crown elevation is 2.85 meters, not a bunk bed ... .2 MM , tube is relatively stable structure. (1.6 meters high, crown elevation is 2.85 meters, not a bunk bed ...