Item Type: Waist Support Material: Import Stretch Fabric, Import Tourmaline Cloth, High Quality Magnet, Steel Plate (4 Pcs) Size: M (100 x 15.8 cm), L (112 x 15.8 cm), XL (124 x 15.8 cm) Weight: 370 g Features: Tourmaline Waist Support, Comfortable Waist Support, Self-Heating Waist Support, Adjustable Waist Support, Magnetic Therapy Waist Support