Home washer and dryers will not do; they are too small. Only commercial size, front load washers should be used. Washer in most homes has an agitator in the center which caused unnecessary stress on the product during washing.
It is of the utmost importance to make absolutely sure that the products are totally dry. If they are not, the down product will be come moldy and decompose.
The down products may not be dry just because the fabric is dry. It must be make sure all of feather and down are dry and fluffy and that there are absolutely no clumps left.