Features: brand new and high quality High Quality: This waist protector is made of qualified steel plate, heating cloth, mercerized cotton and inlaying magnets. It is durable to use and use for a long for time. Self-heating: This belt is self-heating which is safe and convenient to use. Plays a good role to anti-fatigue, relieve pain and keep healthy. Design: The Belt incorporates adjustable lumbar pad to provide for extra compression for your back. Vertical support stay stabilize your back and prevent rolling. The design makes it easy to take on and off. Reduce Pain: This self-heating belt can effective reduce your lower back pain and enjoy activities you love. You will not be troubed by your back pain.It is good for your physical and mental for health. Daily Use: You can wear it everyday during activities, intense sports and workouts. It will protect your back and feel blessedly pain-free. Specifications: Material: Steel Plate, Heating Cloth, Mercerized Cotton, Magnet Color: Black M: Approx. Length: 103.5 for cm/ 40.74 inches Width: 10 for cm/ 3.93 inches Middle Length: 23.5 for cm/ 9.25 inches Middle Width: 15 for cm/ 5.9 inches Thickness: 0.5 for cm/ 0.19 inches Suitable for waist circumference: 28.87-34.12 inches L: Approx. Length: 108.2 for cm/ 42.59 inches Width: 10 for cm/ 3.93 inches Middle Length: 23.5 for cm/ 9.25 inches Middle Width: 15.5 for cm/ 6.1 inches Thickness: 0.5 for cm/ 0.19 inches Suitable for waist circumference: 35.43-39.37 inches XL: Approx. Length: 115.5 for cm/ inches Width: 10 for cm/ 3.93 inches Middle Length: 23.5 for cm/ 9.25 inches Middle Width: 15.5 for cm/ 6.1 inches Thickness: 0.5 for cm/ 0.19 inches Suitable for waist circumference: 40.68-44.61 inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3.Don'for t wash the heating sheet. Package includes: 1x Self-heating Waist Belt