We recommend that these products be used under conventional bedding. Hypoallergenic and Anti Dust Mite Product. Protects your Duvets from spills and splashes. High Density Polypropylene Fabric with Water resistant Coating. Water Resistant Duvet Cover Protector to fit Double Size Duvet, With Zip.PRODUCT DESCRIPTION This Economy Water resistant Duvet Protector has been uniquely designed to protect a duvet from spills and accidents, it is hypo-allergenic ensuring it is suitable for use by those users with allergies. Whilst providing a natural look and feel the Duvet Protector is impermeable to dust mites and is an ideal protector for both asthma and allergy sufferers. To provide maximum hygiene this Water resistant Duvet Protector is made from polypropylene it is also machine washable and requires no ironing and closes with a zip.