1. inflatable sewed tent: This tent is not sealed, it needs to be inflated all the time by blower. Normally we use the material of PVC coated nylon and 0.55mm PVC tarpaulin (for super big tent) to produce it. 2. inflatable welded tent: This tent doesn't need to be inflated all the time, as its supporting frame is sealed. You just need to inflate it once, and then take off the air pump and close the valve on the tent, the tent can be kept inflatable for several days. In that way, welded tent is very convenient and can be moved everywhere needed.