If you are worried about allergies or asthma this Micro-Fresh treated cotbed mattress protector from John Lewis is ideal. It zips around your baby's mattress, fully enclosing it and providing an effective barrier against dust mites and other allergens. The soft Micro-Fresh treated cotton cover is machine washable and ensures a comfortable night's sleep that is kind to your baby's delicate skin. Micro-Fresh technology helps to keep your baby's bedding stay fresher for longer. Using materials that naturally occur in our environment that are kind to human skin, the active ingredients in Micro-Fresh inhibit the spread and growth of bacteria by up to 99.99%. This technology remains active, wash after wash, meaning that it keeps products fresher for longer.