This Micro-Fresh treated pillow protector from John Lewis is the simple way to protect your baby's pillow. If you are worried about allergies or asthma then this is ideal. It fully encloses your child's pillow providing an effective barrier against dust mites and other allergens and is machine washable. The award-winning Micro-Fresh technology helps to keep your babies bedding stay fresher for longer. The active ingredients in Micro-Fresh inhibit the spread and growth of bacteria by up to 99.99% and remain active wash after wash. It uses materials naturally occurring in our environment that are kind to human skin. Contains active biocide: (mineral salts of) titanium dioxide and silver chloride (EU ref: 459)