How to Fix Error 90003907: Material Composition Percentages Must Total 100%
Error 90003907 blocks a listing when the material‑or‑fabric composition percentages do not total exactly 100 %. The validation runs at save/upload and applies to every apparel or textile item, requiring a separate 100 % total for each garment layer.
Overview
Sellers receive error 90003907 when the material‑or‑fabric composition percentages entered for a product do not equal exactly 100 percent. The validation runs at the moment a listing is saved or uploaded, and it blocks the product from becoming active. Fixing the issue quickly prevents delays in launching apparel, textiles, or any item that requires a detailed composition breakdown.
Key Points
- Exact 100 % total required — Amazon’s system rejects any composition entry that adds up to less or more than 100 percent; for example, 88 % cotton + 7 % polyester = 95 % triggers the error.
- Each garment layer is independent — A lined jacket must have a separate 100 % calculation for the outer shell and another for the inner lining.
- Blank or placeholder fields cause failure — Leaving a percentage box empty or inserting “N/A” will also generate the validation message.
- Data must match the physical label — Amazon expects the numbers you provide to reflect the exact figures printed on the product’s care label or supplied by the manufacturer.
- Rounded estimates are unsafe — Supplying “approximately 90 %” without the remaining 10 % will be flagged; precise numbers are mandatory.
How to Resolve Error 90003907
- Gather the official composition sheet — Retrieve the exact fabric breakdown from the manufacturer’s spec sheet or the garment’s care label. Example: The label reads “70 % cotton, 25 % polyester, 5 % spandex.”
- Calculate percentages for each layer – If the product has multiple layers, perform a separate sum for each. Example: Outer shell = 80 % nylon + 20 % polyester = 100 %; Lining = 100 % polyester.
- Enter the numbers into Seller Central – Fill every required percentage field, ensuring no blanks. Example: In the “Material Composition” section, type “70 %,” “25 %,” and “5 %” in the corresponding fields.
- Validate the total manually – Add the entered values with a calculator or spreadsheet to confirm they equal 100 %. : 70 + 25 + 5 = 100.
Analysis & Recommendations
Why This Matters
A blocked listing keeps the product in draft status, delaying new launches and bulk updates. Sellers lose sales opportunity until the composition fields sum to 100 % for each layer, as shown in the winter coat example.
Key Takeaways
- Error code 90003907 is triggered when composition percentages are not exactly 100 %.
- Each garment layer (e.g., outer shell, lining) must have its own independent 100 % total.
- Blank or placeholder entries such as "N/A" also cause the validation to fail.
- Exact numbers from the care label or manufacturer spec sheet are required; rounded estimates are rejected.
Recommended Actions
- →Retrieve the official composition sheet or care label, then go to Seller Central > Inventory > Add a Product and locate the Material Composition se...
- →Enter the exact percentages for each layer, ensuring no fields are left blank, and double‑check that each layer sums to 100 % using a calculator or...
- →Save the listing and re‑submit; if the totals are correct, the error disappears and the product becomes active.
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