Definition: non-allergy producing. A term applied to a preparation in which every possible care has been taken in formulation and production to ensure minimum instance of allergic reactions. (Blakiston's Medical Dictionary)
The definition of hypoallergenic is "having a decreased tendency to provoke an allergic reaction". Based on this definition, our products, including comforters are definitely hypoallergenic. The definition of non-allergenic is "having no tendency to provoke an allergic reaction". Therefore, it cannot be said in truth any product is really non-allergenic. Somebody somewhere will have a reaction.
For many years, companies have been producing products, which they claim are "hypoallergenic" or "safe for sensitive skin" or "allergy tested." These statements imply that the products making the claims are less likely to cause allergic reactions than competing products. But there has been no assurance to consumers that this actually was the case.
Here is then the truth. Despite all the reassurances and claims that manufacturers give us about their products in terms of allergy reactivity, nothing is 100% guaranteed to be non-reactive.