(Canopy Tents) A tent is a shelter consisting of sheets of fabric or other material draped over or attached to a frame of poles or attached to a supporting rope.
Impervious to water
any fabric impervious to water
make watertight; "Waterproof the coat"
Not liable to be washed away by water
rainproof: not permitting the passage of water
Nemo Moki Expedition Tent
My Moki (single-walled waterproof breathable canopy) at White Sand Campground, Clearwater National Forest in Idaho.