The public product records describe cotton covers and wool/polyester construction; this answer has no published numerical formaldehyde test result to quote. Ask the international seller for a relevant report identifying the tested model or material, sampling date, test method and result. Material names and manufacturing-process certificates do not substitute for that report.
Details to check before choosing
For a product claim, compare the model’s material record with the document that supports that claim. Ask customer service for the holder, applicable model or material, report date and scope when those details are important. Company-history material, a workshop film and a model-specific test report provide different kinds of evidence.