A protective envelope for a pillow typically made of a thin-textile or reinforced-paper material intended to create a physical barrier to soiling and cross-contamination. It does not include antimicrobial/probiotic materials but might provide a physical barrier (e.g., tight weave) to dust mites. This device is intended to be used by one patient for a limited time, without laundering, and then discarded (e.g., incinerated).