【Premium Memory Foam】RIPPLE contour memory foam pillow is made of high-quality memory foam material which supports and molds to the cervical contour of your head, neck and shoulders to ensure a better sleep. It can help you relax your cervical spine, and even rest your lower back, knees, calves, feet allowing you to fall asleep faster and more comfortably. 【MULTIFUNCTION & PORTABLE】The neck roll pillow can also be used between the legs for side sleeping comfort, under the knees for back sleeping back , or behind the back as a lumbar support pillow for back rest. travel/storage bag included so you can bring it on flights & trips while keeping it clean. 【Ergonomically Designed】These cylinder pillows are made out of high quality memory foam. The round neck pillow for sleeping cradles your neck in the best position to maintain a straight spine.Tip: place the pillow under your knees to soothe your legs! 【Breathable and Washable Pillowcase】The pillowcase is made of polyester fiber, excellent air permeability, The side sleeper pillow pillowcase has a zipper that is easy to remove and can be easily cleaned. Note that pillow core can not be washed!