Amazon error 90004200: The material composition lacks a percentage
This explanation also covers: 18280
What does it mean?
For the fabric type Amazon expects a percentage, such as “100% Cotton” rather than “Cotton”.
How to fix it
Add the percentage to the material composition.
Where do you fix it?
- In your product data (your source)
- 90057The field contains an invalid value
- 8105Attribute data does not match the list of valid values
- 90111Invalid value, for example not a valid number or currency
- 90114The value is lower than the minimum allowed
- 90221The value must be greater than the limit
- 90197The value is greater than the allowed maximum
- 90226The value is shorter than the allowed minimum
- 90117The value exceeds the maximum length
Source
Summarised in our own words; Amazon's page is leading.