This firm memory foam pillow supports your head in optimal alignment with the spine while delivering to your neck and shoulders the natural warmth and healing energy of Amethyst, Tourmaline, Obsidian, and Jade gemstones. Crushed gemstones emit invisible, natural and deep penetrating light therapy called far-infrared (FIR). Combine FIR with your own body heat and you help intensify their effect. FIR warms, relaxes, and reduces pain and stiffness in the neck and shoulders. Use between the knees to promote low back and hip alignment and reduce pain.