sentences:  Dust mites produce waste products that irritate the lining of the airways and lungs and particularly with children can bring on allergic reactions, asthma and can irritate skin conditions such as eczema.A full zippered encasement allergen filtration mattress protector can provide an extra layer of protection between the user and their mattress, filtering allergens that are known to trigger allergy and asthma symptoms.For protection against bed bugs, the mattress and box spring must both be fully enclosed with no possible openings.