Adjustable Double Pull Magnetic Therapy Self Heat Lower Back Brace Belt Lumbar Support Pain Relief Waist Trimmer Slimming Belt Waist Trainer Double Pull support design Suit for people who always work sedentarily or in a prolonged standing position such as drivers or office workers. Athletes or people doing regular exercise 20 powerful self-heating tourmaline magnets designed inside the belt (12pcs at the back and 8pcs at the front), can help to relieve pain associated with joint and back problems by increasing blood flow to the area The belt is made of high quality neoprene with elastic side panels with 2 fully adjustable Velcro fastening straps on both sides, for easy and comfortable to use