ExAller for allergies to house mites and dust 300 mlExAller in case of allergy to house dust mites is a medical device that removes mites from mattresses, bedding, carpets, upholstery or other furniture. Experience relief from the symptoms of mite allergy after the first use. It does not need any special fabric to use ExAller. To treat your mattress (which usually contains the most mites), simply use the sheet on which you slept. However, if you are using a mattress cover, remove it before treatment.