... bathtub don't need to be added water.3. Portable, removable, durable, folding,save water & space,dismountable, ... Eco-friendly waterproof fabric (Nonplastic); Insulation layer Net weight/ Gross weight6.5KG/8KGSuitable Temperature-30-150 degreesMain ... and FastHeat Insulation effectMore than 1 hourFeatureFolding, Removable, Portable, Simple operation, Save water and space, Lasting heat ...