When you rest yourself against this gemstone bolster, you’ll feel the warm crushed amethyst gently pressed against your neck to relieve tension and deliver natural healing benefits. The size of this Amethyst bolster is ideal to be also used under the lower back, and knees. Deep penetrating far-infrared rays (FIR) will soothe and relax the muscles and provide support throughout the night, limiting discomfort in the morning. On top of that, far-infrared heat takes this a step further by relaxing muscles and further helping to reduce stiffness and ease you into a deep sleep. Perfected by sleep experts, this design delivers optimal support to your body’s vital spots as you lie in bed or use your mat. Relax your muscles, reduce pain and tension, and improve circulation in targeted areas with the Amethyst Bolster.