Adjustable Height Cervical Pillows - Two different heights on either side let you choose the optimal pillow height for your sleeping position—tummy, back, or side sleeping. - Special grooves keep your arms comfortably underneath the pillow. Ergonomically Designed Butterfly Pillow - Butterfly Pillow features six contoured areas that follow the natural curves of your body. - The 15-degree inclined hollow surface supports your head while preserving the neck curve, helping maintain proper spine alignment. - Aims to reduce morning stiffness and promote a refreshed, pain-free feel. Premium Memory Foam Neck Support - Made from high-quality, resilient memory foam that is firm yet comfortable. - Provides support for the head, neck, shoulders, and back muscles for both back and side sleepers. Soft & Stretchable Double-Layer Pillowcase - Double-layer pillowcase in cotton and polyester fiber. - Soft, stretches with the pillow insert, and fits snugly to the skin for a luxurious sleeping experience. Use scenarios - Side sleepers needing neck alignment and a space for arms under the pillow. - Back sleepers seeking precise neck support to keep the spine aligned. - Sleepers who switch positions, using adjustable height to accommodate tummy, back, or side sleeping.