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

1. 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.”
2. 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.
3. 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.
4. Validate the total manually – Add the entered values with a calculator or spreadsheet to confirm they equal 100 %. : 70 + 25 + 5 = 100.