Frame Tents
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 cat-and-dog weather fly. For only skin tents, the inner tent is often make-believe of waterproof-breathable material that prevents liquid water from penetrating the inside of the tent, but still allows damp vapour to be transported out.
A flysheet consists of a especial rectangular sheet of Frame Tents material