The water resistance specifications(*1) of this Walkman are equivalent to IEC 60529 “Degrees of protection against ingress of water (IP Code)” IPX5/8(*2), and the dust proofing specifications of this Walkman are equivalent to IEC 60529 “Degrees of protection against solid foreign objects” IP6X(*3). If you use your Walkman in a swimming pool, do not exceed a depth of 2 m (6.5 feet) while wearing it.
Be sure to read and understand the water resistant/dust proof specifications completely before use.

^(*1) The headphone sections are not completely watertight.

^(*2) IPX5 (Degrees of protection against jets of water): Your Walkman, when Swimming earbuds are attached, has been tested under and maintains its operability under the following test conditions: When exposed to direct streams of water from any direction where approximately 12.5 l/min. of water is supplied for more than 3 minutes from a distance of approximately 3 m using a nozzle with an inner diameter of 6.3 mm. However, this does not apply to the headphone sections.
IPX8 (Degrees of protection against continual water submersion): Your Walkman, when Swimming earbuds are attached, has been tested to and maintains its operability when submersed in water to a depth of 2 m for 30 minutes.

^(*3) IP6X (Degrees of protection against dust): Your Walkman, when Swimming earbuds are attached, has been tested to and continues to block dust after stirring for 8 hours in a testing device which contains dust particles that are up to 75 μm in diameter.