My son was recently diagnosed with extreme allergy to dust and dust mites. This product was recommended to us by our dr when I approached him as to which product was worth our time and money to help our son. He answered that in his opinion we would not be disappointed in spending a little more and getting something worth our while to help our son. He was right! This product was worth the money and has helped our son so much! Would buy again and recommend to all who are looking!