I do not write many product reviews, but these head positioning pillows have been a life changer for me. Due to cervical issues with my neck from years of sports and just living ... sleeping with my head turned even slightly regularly brings about expensive, chiropractic visits, however, I have stayed out of the chiropractor's office since I started using these clever and very comfortable head stabilizers, and I couldn't be more thrilled. I have removed the pillows from the inside of the covers several times and they wash nicely. They are also incredibly sturdy, and I haven't had any problems with the ties or the zippers. I am ordering an additional set to ensure I will always have them available. Truly...these have improved my sleep by significantly reducing discomfort and achiness in my neck and shoulders throughout the night. I honestly don't know how I could ever sleep without them again! Fortunately, they shrink down nicely in an air compression bag, so they always accompany me when I travel! LIFE CHANGER!