Here's a quick guide to IPXX earphone ratings: IPX4:Water splashed against all sides of the enclosure does not affect the headphones. They are sweatproof and suitable for working out. IPX5: This rating indicates that the headphones can withstand light water sprays from all directions. As a result, headphones with this rating are ideal for heavy rain. IPX6: This rating denotes that the headphones can withstand strong water jets without the audio drivers failing. They are ideal for listening to music in the shower without having to worry about the spray damaging the headphones. IPX7: This rating indicates that the headphones are waterproof for up to 30 minutes in 1 meter of water. Nano-coated components are dependable for earphone protection.