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A flexible, multilayered tube with superior chemical resistance, heat resistance, and airtightness, as well as superior flexibility and resistance of the inner surface to staining. The tube comprises a flexible, multilayered tube having a first layer comprised of a non-porous polytetrafluoroethylene

A flexible, multilayered tube with superior chemical resistance, heat resistance, and airtightness, as well as superior flexibility and resistance of the inner surface to staining. The tube comprises a flexible, multilayered tube having a first layer comprised of a non-porous polytetrafluoroethylene structure and a second layer comprised of a porous polytetrafluoroethylene structure laminated onto the outer peripheral surface of said first layer. The tube is useful as a medical tubing and in particular useful as an endoscope tube.

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[ We claim:] [1.] A flexible, multilayered tube comprisinga) a first layer consisting essentially of a non-porous structure comprised of polytetrafluoroethylene, said non-porous structure having a thickness of less than 300 micrometers and having an outer peripheral surface: andb) a second layer com

[ We claim:] [1.] A flexible, multilayered tube comprisinga) a first layer consisting essentially of a non-porous structure comprised of polytetrafluoroethylene, said non-porous structure having a thickness of less than 300 micrometers and having an outer peripheral surface: andb) a second layer comprised of a porous polytetrafluoroethylene structure laminated onto the outer peripheral surface of said first layer, and having a porosity of about 30 to 70 percent; rein the thickness of the first layer is 1/1000 to 1/2 of the combined thickness of the first layer and second layer.