A protective sheath assembly for covering an ultrasound transducer includes a sheath that includes a tubular portion formed of a first flexible material and having a first end and a second end and a planar portion secured to the first end of the tubular portion to close the first end of the tubular portion. The planar portion is formed of a second flexible material that is different from the first flexible material. The second flexible material comprises a substrate layer and an adhesive and/or hydrophilic coating layer formed on at least one surface of the substrate material, such that upon insertion of the ultrasound transducer into the tubular portion, an operating end of the ultrasound transducer engages the adhesive and/or hydrophilic coating layer.