The lower back brace gives men and women immediate & lasting Lower Back and Hip Pain Relief from herniated disc, sciatica, back pain, sore muscles and other back conditions. Self-heating Tourmaline AND 3500 Gauss Magnets - Help to retain body heat to improve the blood circulation and promote metabolism for recovery and relieve pain Dual adjustment straps provide customized fit and compression - perfect fit design makes it comfortable and easy to wear under any Close-fitting clothes. Permits full range of movement while providing comfortable support. Wear it when you walk, working and rest , bend or stretch. Enjoy the freedom of movement Size: M - Suitable for waistline from about 29"-37"; L - Suitable for waistline from about 31"-40"; XL- Suitable for waistline from about 33"-43"; XXL- Suitable for waistline from about 35"-46"; Front width - 4" ; Back width - 6"