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IP ratings on personal care products
IPX7 and IP67 differ by one character and by whether dust is covered at all.
An IP rating has two digits: solids then liquids. IPX7 uses X for the first digit, which means the product has not been tested for dust ingress, and 7 for the second, which means it survives immersion in one metre of water for thirty minutes.
IP67 replaces the X with a 6, which means fully dust tight. For a razor that lives in a bathroom, the water digit is what matters and IPX7 is adequate. For one carried in a travel bag with everything else, the dust digit stops being decorative.
Neither rating is a statement about shaving in the shower specifically, and neither covers hot water indefinitely or steam. They are laboratory tests with defined conditions, and a product that passes them is not thereby waterproof in every sense a customer might imagine.
The practical rule for a listing is to state the rating as it appears on the model sheet, without translating it into a claim. "IPX7" is checkable; "fully waterproof" is a returns liability.
Specifications
| First digit | Dust; X means not tested |
|---|---|
| Second digit 7 | Immersion, one metre, thirty minutes |
| IPX7 | Water tested, dust untested |
| IP67 | Dust tight and immersion tested |
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