【Butterfly Wing Curve Design】The curve on both sides of Good Nite memory foam pillow divides the area for arm placement and side sleeping, providing strong support and avoiding arm numbness. 【Various Sleeping Positions】The central part of the orthopedic pillow is concave and designed with breathable holes to feel your head wrapped up when sleeping on your back, prevent your face from being squeezed when sleeping on your stomach, and have the support of the side wings when sleeping on your side. 【Two Heights】The sides of the neck pillows for sleeping neck pain are 10cm and 12cm respectively, alternating between the previous week and the old pillow to find the most suitable sleeping height. 【High Quality Memory Pillow Core】5 second slow rebound memory foam core, absorbs body pressure and releases it, able to return to initial height after effective support. 【Three-layer Structure Design】 memory pillow design dustproof inner cover, pillowcase and dustproof inner cover play a double dustproof, portable dismantling and washing role. 【High quality fabric】The pillowcase is made of soft skin-friendly fabric and the grey design of the neck has multiple holes to keep the neck fresh. The central ventilated hole is designed with a button for easy opening and closing to remove and wash or keep it breathable.