and 22 the sides of corresponding lengths 3 to 12 and 4 to 13 one seam on each side of the tent floor also the sides 17 and 18 of the head canopy 16 are joined in seams 23 and 24 to the sides of the floor of corresponding lengths 5 to 17 and 6 to 18 tubular pockets 27 and 28 are attached to the free margins 14 and 15 and 19 and 20 of the two canopies each of these tubular pockets is adapted to receive an inflatable tube 25 which may be inserted into the pocket through an opening 26 the inflatable tubes may be made of any airtight material and their dimensions are such that when they are inflated the tubes essentially fill the pockets and cause them to form angular arches 32 the ends 33 of the tubular pocket 27 of the head canopy are attached to the tent floor at angles 9 and 10 likewise the end 34 of the tubular pocket 28 of the foot canopy is attached to the triangular extensions of the floor 35 and 36 when the tent is closed these inflated arches overlap with the inflated pocket 28 of the foot canopy overriding the inflated pocket of.