In general, pillows are restored well for their price, the powders are good, but the feathers, apparently, are not washed at all. As there was a pile of dust before the delivery, so there was a pile of dust after the return of the pillows in new bulk. There is no need to talk about some kind of hyperallergic treatment.
My personal opinion is that it is better to pay extra in another company and get really clean and updated pillows, rather than the same dirty feather in another bulk.