NECK AND SHOULDER PAIN: The contour design of this cervical neck pillow perfectly cradles the head, bringing a reduction of stress in the cervical vertebrae and spine. Maintain good blood flow to the neck and head.PATENTED ERGONOMIC DESIGN: LINSY HOME butterfly patented neck pillows are well-designed with multiple zones on the pillow for support following the natural curve of your body to keep air passages optimal for less snoring and cervical pressure relief and more restful sleep. The cutouts on the side give your top arm a place to rest and keep it at an angle so your shoulder is not hunching over in front of you.HEIGHT ADJUSTABLE - FOR BACK & SIDE SLEEPER: LINSY HOME adjustable side sleeper pillow is the ideal bed pillow while your sleep needs happen to change. Just rotate the pillow to enjoy different heights (3.1''-3.9''). what's more, the removable insert (0.8'') at the bottom and add 2 memory foam pieces (0.8") also provides more height liberty, which gives you more choice to enjoy a higher or lower contour!SAY GOODBYE TO HOT SLEEPING: Our neck pillows for sleeping adopts moisture-wicking Nylon fiber pillowcase and high-density memory foam with Fermat Spiral ventilated holes, which you can always own a cooling and sweet dream. Additionally, this breathable cervical pillowcases with zippers for easy cleaning and disassembly.CERTIFIED WITH CERTIPUR-US & OEKO-TEX: Our neck pillow is made from premium 60D memory foam which is chemical-free, non-toxic and odorless, and safe for daily use! The slow-rebound feature and innovative memory foam made it support firmly with comfort and softness. We also offer a lifetime warranty on this pillow for neck pain. If you have any questions, please feel free to contact us, we are 24/7 for you.