OEM is our best. Box construction Boxes to prevent content shifting Double stitch with piping. 233 thread count 233 threads/sq inch to prevent down/feather from escaping 100% fine Cotton to allow the down/feather to breathe Small duck feather for filling Filled with small white duck feather to provide comfortable and resilient support that you need Hypoallergenic Anti-microbial process used to eliminate bacteria and render filling hypo-allergenic