The treated fibres provide protection against dust mites, bacteria and fungal growth, creating a more comfortable, healthier and hygienic environment for the whole family. The outer cover is made of the softest polyester microfibres while the filling is 100% anti-allergy treated polyester. This duvet is recommended for use in the colder months of the year or in a house where the level of heating is not what it might be in a newer build. PLEASE NOTE: The discount reflected (approx. 20%) is on the manufacturer’s recommended retail price.