The inner tent comprises the main body of the tent. For double skin tents, the inner tent (often mesh) is not waterproof since it is protected by the rain fly. For loner skin tents, the inner tent is often specious of waterproof-breathable material that prevents liquid saturate from penetrating the inside of the tent, but still allows water Tents vapour to be transported out.
Depending on the desired tent size, airbeams can be anywhere from 2-40 inches in diameter, inflated to different pressures. Great pressure airbeams (40-80 psi) that are filled by compressors are most often used in over shelters, whereas below pressure beams (5-7 psi) are preferred for recreational use. The relatively depressed pressure enables the use of a manual pump to inflate the airbeam to the desired level. Airbeams have the unique quality of bending, rather than breaking, when overloaded. Tents that use inflatable airbeams are structured almost identical to those that employment flexible poles.