The Rejuvenate SmartHood is made with a flexible Lycra fabric infused with far-infrared emitting minerals that keep neck and shoulder muscles warm and relaxed. It features 27 magnets (1100 gauss) over key acupuncture points for stimulation of those areas in In ancient (and current) Chinese medicine, acupuncture is performed by using onefts own blood to re-inject over targeted acupuncture points. The reasoning for this method is because the body takes quite some time to re-absorb its own blood after being placed in targeted areas in Therefore, prolonging the benefits. We have selected these magnets to serve to the affected by pulling the blood to those targeted areas which will continually stimulate those areas during and after the SmartHood is worn. Each magnet is enclosed in a soft cushion for enhanced comfort. The hood harmonizes bodily functions safely and naturally, stimulating recovery time, promoting blood circulation, increasing oxygen flow, and ultimately reducing pain and stiffness. Product Features and Facts: Available in Medium, Large, and X-Large Quick-dry/Hygroscopic technology helps regulate body temperature. Machine washable. Wash COLD with a mild detergent. Line dry. Available in black only.