Effective relaxation pain: safe and easy, effectively relieves neck stiffness and muscle pain. Recovery from injuries, back and neck, back pain and even pain relief for fibromyalgia. Effective heat: keeps you warm in cold winter. Prevent damage to the body from cold weather. Comfortable and adjustable: with a super strong nylon buckle fastener for adjusting a comfortable position that adapts to your neck. Adjust the voltage as needed. Suitable for the Crowd: suitable for older and pregnant women outdoors, effectively protects the neck from cold. Compact and light: easy to carry. When used, it is well hidden under the collar. Take it off and put it in your pocket. Colour: gray-white Material: bamboo charcoal fiber + latex silk + nylon buckle Size: 50x10CM Package Contents: 1 * Neck pad Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.