Originally developed for NASA this space-age Elastic Polyurethane memory foam Pillow conforms to your head and neck to ensure an anatomically supportive sleep posture. Features a therapeutic shape to provide additional support for your neck while comfortably cradling your head. Keeps your head cool while your body gets hot, and allows the healing properties of the Amethyst crystals to calm and relax your mind. Includes a luxurious velour zip cover for easy cleaning. Considered a must according to Eastern Medicine.