My chiropractic office has been using Pillowise pillows for one year now. During this past year, we have only had one patient who has asked for a refund and that was because she had undergone surgery and the pillow no longer fit. Everyone has been pleased with having a pillow that is custom made to their own body. My wife and two children have them and I can feel confident that they are growing up with healthy necks and shoulders. The material, Tencel, was what had my wife feel confident with us carrying this product in our office. Thank you, Pillowise!