Lower Back Warming Belt - Back Pain Relief And Recovery - Natural Heat - Wool Liner Type: Back & Waist Size: Large Color: Black Features: Woollen fibres directly effect on cutaneous receptors, speed regeneration processes in a cell and in a lumbar area in general, reducing pain. Wool absorbs 33% of moisture, evaporates it and stay dry. Such heating is effective for treatment radiculitis, lymphadenitis, soothe rheumatic pains in joints. Woollen fibres make micro massage, helping to increase microcirculation of blood. Material - Inner: Wool 100%, Outer: Latex 27%/Polyester 73% Best quality. Manufacturer has 15 years expertise in design and production of orthopedic appliances.