DS1 has just been confirmed allergic to house dust mites and the hospital gave me a leaflet about Allerguard mattress/pillow/duvet protectors but they are really expensive!!! So I just wondered if anyone had used them and if they are worth the money, or if there are any other alternatives? The leaflet says that products labelled "hypoallergenic" or "anti-allergy" are often not as effective. Any advice would be very much appreciated.