What the IP number actually measures
The two digits after \”IP\” cover two different things — the first number rates protection against dust and solid particles, the second rates protection against liquid. For earbuds, almost all the marketing attention goes to that second digit.
What IPX4 actually covers
IPX4 means splash resistance from any direction — sweat dripping during a workout, light rain, or an accidental splash from a sink. It does not mean the earbuds can be submerged or rinsed under a running tap.
What IPX7 actually adds
IPX7 means the earbuds can survive full submersion in up to a meter of water for around 30 minutes. That covers an accidental drop in a pool or sink, and makes a real difference for swimmers or anyone genuinely worried about full water contact, not just sweat.
Why most people don\’t need IPX7
If your main concern is gym sweat, running in light rain, or a rainy commute, IPX4 already handles all of that. IPX7 is solving a problem — full submersion — that most casual buyers will never actually run into.
The trade-off that comes with higher ratings
Higher water resistance usually means a tighter seal around the charging contacts and casing, which can add slightly to the price and, in some designs, to the size of the earbuds themselves.
The practical takeaway
Match the rating to what you\’ll actually do, not the biggest number on the box. Gym-goers and commuters are well covered by IPX4. Swimmers or anyone who\’s dropped a phone in a sink before should look specifically for IPX7 or higher.