: Positioned between you and your top cover; it protects comforters and duvets from body oils. Duvet vs. Comforter :
Selecting the right fabric depends on your sleeping habits and climate: 8 Types of Bed Sheets For Every Sleeping Type | Casper Blog BEDDING
The Ultimate Guide to Bedding: Science, Style, and Maintenance : Positioned between you and your top cover;
are two-piece systems consisting of an insert and a removable cover, making them easier to wash. BEDDING
: Features elastic edges to stay secure and provide a smooth sleeping surface.