Quality tested 21.2 gauge (0.53mm) waterproof super soft flocked top and sides with 15 gauge (0.38mm) bottom. * Flocked sleeping surface and sides for comfort. * Approximately 60" x 80" (152cm x 203cm) queen-sized mattress is raised 18" (46cm) from the floor for convenience. * Bottom of bed is contoured to provide extra gripping to increase stability. * Inflates with built in electric inflation pump in about 4 minutes